This market will resolve according to the winner of the Democratic Primary for United States Senator from Maine.
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.Graham Platner holds overwhelming trader consensus in the Maine Democratic Senate primary due to his sustained large leads in recent polls and the April 30 suspension of Governor Janet Mills’ campaign. Polling throughout spring consistently placed the oyster farmer and Marine veteran 20 to 38 points ahead of Mills, who struggled with fundraising and message traction despite national Democratic support. With Mills out and remaining candidates trailing far behind, Platner has redirected resources toward the November general election matchup against Republican Senator Susan Collins. The June 9 primary date still stands, yet late developments such as unforeseen controversies or shifts in voter turnout among key Democratic blocs represent the narrow pathways that could still affect the outcome before ballots are cast.
This market will resolve according to the winner of the Democratic Primary for United States Senator from Maine.
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.
This market will resolve according to the winner of the Democratic Primary for United States Senator from Maine.
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.
Graham Platner holds overwhelming trader consensus in the Maine Democratic Senate primary due to his sustained large leads in recent polls and the April 30 suspension of Governor Janet Mills’ campaign. Polling throughout spring consistently placed the oyster farmer and Marine veteran 20 to 38 points ahead of Mills, who struggled with fundraising and message traction despite national Democratic support. With Mills out and remaining candidates trailing far behind, Platner has redirected resources toward the November general election matchup against Republican Senator Susan Collins. The June 9 primary date still stands, yet late developments such as unforeseen controversies or shifts in voter turnout among key Democratic blocs represent the narrow pathways that could still affect the outcome before ballots are cast.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
May 2 2026
Graham Platner surges to near-certain frontrunner status in Maine Democratic Senate primary
Graham Platner jumps to 99%7%
Market prices surged to nearly 99% for Graham Platner as he became the overwhelming favorite to win the Democratic primary, reflecting broad voter support and the collapse of other candidates' chances, including Janet Mills who dropped to near zero.
Apr 24 2026
Graham Platner surges to near-certain frontrunner status in Maine Democratic Senate primary
Graham Platner surges to 93%17%
As the primary approached, Graham Platner's support surged dramatically, reflecting growing voter confidence in his candidacy and the continued decline of other candidates, including Janet Mills. This surge was likely influenced by ongoing voter dissatisfaction with establishment figures and Platner's grassroots appeal.
Apr 17 2026
Maine legislature passes data center moratorium bill amid community backlash
Janet Mills plunges to 9%15%
Maine lawmakers approved a yearlong moratorium on large data centers, reflecting growing political opposition to tech projects due to concerns about energy use and community impact. Governor Janet Mills, running for Senate, faced this contentious issue, which may have influenced voter perceptions and the primary race.
Feb 27 2026
Maine governor challenges federal immigration enforcement amid rising community fear
Janet Mills drops to 22%12%
Governor Janet Mills publicly demanded warrants and transparency from federal immigration officials amid widespread fear in immigrant communities due to ICE operations. This stance likely affected her support in the Democratic primary, as voters reacted to the immigration enforcement climate.
Jan 23 2026
Platner wins endorsement from Senator Bernie Sanders
Graham Platner surges to 99%33%
Senator Sanders publicly endorsed Platner, cementing his anti‑establishment credentials and driving his price close to certainty.
Jan 15 2026
Department of Homeland Security launches immigration enforcement operation in Maine
Janet Mills dips to 33%3%
The DHS initiated 'Operation Catch of the Day' targeting criminal illegal migrants in Maine, leading to increased immigration enforcement activity. Governor Janet Mills publicly criticized the operation, highlighting tensions that may have influenced voter sentiment and the Senate primary dynamics.
Dec 30 2025
Maine Governor Mills declines to sign data‑center moratorium
Graham Platner surges to 92%34%
Mills’ decision not to sign the moratorium signaled a split with the legislature, further isolating her and boosting Platner’s momentum.
Dec 18 2025
Maine Democratic Party removes Mills from primary ballot
Janet Mills plunges to 0%36%
Following her withdrawal, the state party officially struck Mills’ name from the ballot, effectively ending her campaign and solidifying Platner’s lead.
Dec 7 2025
Maine Democratic Party releases fundraising report showing Platner outpacing Mills
Graham Platner surges to 78%17%
A state‑party filing revealed Platner had raised significantly more money than Mills, confirming his growing viability and pushing his market price higher.
Nov 25 2025
Janet Mills announces she will not seek re‑election as governor
Janet Mills plunges to 9%21%
Mills confirmed she would not run for a third term as governor, removing any fallback option and further eroding her political base in the Senate race.
Nov 14 2025
Janet Mills withdraws from Maine Senate race, endorsing Graham Platner
Graham Platner jumps to 69%7%
Janet Mills officially ended her Senate campaign due to lack of fundraising and support, marking a significant victory for Graham Platner and signaling a rejection of establishment candidates by Maine Democratic voters. This event caused a sharp increase in Platner's market price and a collapse in Mills' chances.
Nov 13 2025
Schumer’s recruitment of Platner criticized by moderate Democrats
Graham Platner surges to 72%27%
Senate Democratic leader Chuck Schumer’s backing of Platner drew backlash from moderate Democrats, reinforcing the narrative of an anti‑establishment wave and further rallying grassroots support for Platner.
Oct 22 2025
Maine Legislature passes data‑center moratorium bill
Graham Platner jumps to 64%11%
The Democratic‑controlled Legislature approved a year‑long freeze on large data‑center projects, sending the bill to Gov. Mills. The controversy over tech development highlighted local economic concerns and boosted Platner’s outsider appeal.
Oct 14 2025
Jared Golden ends Senate campaign
Jared Golden drops to 0%11%
Golden withdrew from the race, causing his price to fall to zero.
Oct 12 2025
Troy Jackson exits Maine Senate primary
Troy Jackson dips to 0%3%
Jackson announced his withdrawal, pushing his market price to zero.
Oct 10 2025
Jordan Wood suspends Senate campaign
Jordan Wood plunges to 0%19%
Wood withdrew, eliminating his share of the race and driving his price to zero.
Oct 8 2025
Chellie Pingree ends Senate bid
Chellie Pingree dips to 0%3%
Pingree formally ended her campaign, sending her price to zero.
Oct 5 2025
Dan Kleban drops out of Senate primary
Dan Kleban plunges to 0%15%
Kleban announced he would not continue his campaign, causing his market price to collapse to zero.
Oct 3 2025
Gov. Janet Mills withdraws from Maine Democratic Senate primary, endorses Graham Platner
Graham Platner jumps to 59%14%
Mills announced she could not raise sufficient funds and withdrew, effectively clearing the field for Platner and causing his support to surge as voters coalesced around the anti‑establishment candidate.
Oct 3 2025
Gov. Janet Mills abandons Senate campaign, endorses Graham Platner
Graham Platner surges to 60%18%
Maine’s two‑term Democratic governor announced she could not raise enough funds and withdrew, throwing her support behind oyster farmer Graham Platner. The move eliminated the establishment favorite and sent Platner’s market price sharply upward.
Sep 20 2025
Early poll shows Platner leading primary field
Graham Platner jumps to 42%8%
A regional poll released by a local news outlet placed Platner ahead of Mills and other candidates, prompting early price gains for Platner and declines for the rest.
Sep 18 2025
Graham Platner gains momentum as anti-establishment candidate in Maine Senate race
Graham Platner surges to 53%19%
Graham Platner, an oyster farmer with no prior elected office, began gaining significant support as Democratic voters in Maine showed a preference for anti-establishment candidates, challenging the party's national leadership's preferred candidate, Janet Mills. This shift caused Platner's market price to rise sharply and Mills' to decline.
This market will resolve according to the winner of the Democratic Primary for United States Senator from Maine.
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.Graham Platner holds overwhelming trader consensus in the Maine Democratic Senate primary due to his sustained large leads in recent polls and the April 30 suspension of Governor Janet Mills’ campaign. Polling throughout spring consistently placed the oyster farmer and Marine veteran 20 to 38 points ahead of Mills, who struggled with fundraising and message traction despite national Democratic support. With Mills out and remaining candidates trailing far behind, Platner has redirected resources toward the November general election matchup against Republican Senator Susan Collins. The June 9 primary date still stands, yet late developments such as unforeseen controversies or shifts in voter turnout among key Democratic blocs represent the narrow pathways that could still affect the outcome before ballots are cast.
This market will resolve according to the winner of the Democratic Primary for United States Senator from Maine.
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.
This market will resolve according to the winner of the Democratic Primary for United States Senator from Maine.
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.
Graham Platner holds overwhelming trader consensus in the Maine Democratic Senate primary due to his sustained large leads in recent polls and the April 30 suspension of Governor Janet Mills’ campaign. Polling throughout spring consistently placed the oyster farmer and Marine veteran 20 to 38 points ahead of Mills, who struggled with fundraising and message traction despite national Democratic support. With Mills out and remaining candidates trailing far behind, Platner has redirected resources toward the November general election matchup against Republican Senator Susan Collins. The June 9 primary date still stands, yet late developments such as unforeseen controversies or shifts in voter turnout among key Democratic blocs represent the narrow pathways that could still affect the outcome before ballots are cast.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
May 2 2026
Graham Platner surges to near-certain frontrunner status in Maine Democratic Senate primary
Graham Platner jumps to 99%7%
Market prices surged to nearly 99% for Graham Platner as he became the overwhelming favorite to win the Democratic primary, reflecting broad voter support and the collapse of other candidates' chances, including Janet Mills who dropped to near zero.
Apr 24 2026
Graham Platner surges to near-certain frontrunner status in Maine Democratic Senate primary
Graham Platner surges to 93%17%
As the primary approached, Graham Platner's support surged dramatically, reflecting growing voter confidence in his candidacy and the continued decline of other candidates, including Janet Mills. This surge was likely influenced by ongoing voter dissatisfaction with establishment figures and Platner's grassroots appeal.
Apr 17 2026
Maine legislature passes data center moratorium bill amid community backlash
Janet Mills plunges to 9%15%
Maine lawmakers approved a yearlong moratorium on large data centers, reflecting growing political opposition to tech projects due to concerns about energy use and community impact. Governor Janet Mills, running for Senate, faced this contentious issue, which may have influenced voter perceptions and the primary race.
Feb 27 2026
Maine governor challenges federal immigration enforcement amid rising community fear
Janet Mills drops to 22%12%
Governor Janet Mills publicly demanded warrants and transparency from federal immigration officials amid widespread fear in immigrant communities due to ICE operations. This stance likely affected her support in the Democratic primary, as voters reacted to the immigration enforcement climate.
Jan 23 2026
Platner wins endorsement from Senator Bernie Sanders
Graham Platner surges to 99%33%
Senator Sanders publicly endorsed Platner, cementing his anti‑establishment credentials and driving his price close to certainty.
Jan 15 2026
Department of Homeland Security launches immigration enforcement operation in Maine
Janet Mills dips to 33%3%
The DHS initiated 'Operation Catch of the Day' targeting criminal illegal migrants in Maine, leading to increased immigration enforcement activity. Governor Janet Mills publicly criticized the operation, highlighting tensions that may have influenced voter sentiment and the Senate primary dynamics.
Dec 30 2025
Maine Governor Mills declines to sign data‑center moratorium
Graham Platner surges to 92%34%
Mills’ decision not to sign the moratorium signaled a split with the legislature, further isolating her and boosting Platner’s momentum.
Dec 18 2025
Maine Democratic Party removes Mills from primary ballot
Janet Mills plunges to 0%36%
Following her withdrawal, the state party officially struck Mills’ name from the ballot, effectively ending her campaign and solidifying Platner’s lead.
Dec 7 2025
Maine Democratic Party releases fundraising report showing Platner outpacing Mills
Graham Platner surges to 78%17%
A state‑party filing revealed Platner had raised significantly more money than Mills, confirming his growing viability and pushing his market price higher.
Nov 25 2025
Janet Mills announces she will not seek re‑election as governor
Janet Mills plunges to 9%21%
Mills confirmed she would not run for a third term as governor, removing any fallback option and further eroding her political base in the Senate race.
Nov 14 2025
Janet Mills withdraws from Maine Senate race, endorsing Graham Platner
Graham Platner jumps to 69%7%
Janet Mills officially ended her Senate campaign due to lack of fundraising and support, marking a significant victory for Graham Platner and signaling a rejection of establishment candidates by Maine Democratic voters. This event caused a sharp increase in Platner's market price and a collapse in Mills' chances.
Nov 13 2025
Schumer’s recruitment of Platner criticized by moderate Democrats
Graham Platner surges to 72%27%
Senate Democratic leader Chuck Schumer’s backing of Platner drew backlash from moderate Democrats, reinforcing the narrative of an anti‑establishment wave and further rallying grassroots support for Platner.
Oct 22 2025
Maine Legislature passes data‑center moratorium bill
Graham Platner jumps to 64%11%
The Democratic‑controlled Legislature approved a year‑long freeze on large data‑center projects, sending the bill to Gov. Mills. The controversy over tech development highlighted local economic concerns and boosted Platner’s outsider appeal.
Oct 14 2025
Jared Golden ends Senate campaign
Jared Golden drops to 0%11%
Golden withdrew from the race, causing his price to fall to zero.
Oct 12 2025
Troy Jackson exits Maine Senate primary
Troy Jackson dips to 0%3%
Jackson announced his withdrawal, pushing his market price to zero.
Oct 10 2025
Jordan Wood suspends Senate campaign
Jordan Wood plunges to 0%19%
Wood withdrew, eliminating his share of the race and driving his price to zero.
Oct 8 2025
Chellie Pingree ends Senate bid
Chellie Pingree dips to 0%3%
Pingree formally ended her campaign, sending her price to zero.
Oct 5 2025
Dan Kleban drops out of Senate primary
Dan Kleban plunges to 0%15%
Kleban announced he would not continue his campaign, causing his market price to collapse to zero.
Oct 3 2025
Gov. Janet Mills withdraws from Maine Democratic Senate primary, endorses Graham Platner
Graham Platner jumps to 59%14%
Mills announced she could not raise sufficient funds and withdrew, effectively clearing the field for Platner and causing his support to surge as voters coalesced around the anti‑establishment candidate.
Oct 3 2025
Gov. Janet Mills abandons Senate campaign, endorses Graham Platner
Graham Platner surges to 60%18%
Maine’s two‑term Democratic governor announced she could not raise enough funds and withdrew, throwing her support behind oyster farmer Graham Platner. The move eliminated the establishment favorite and sent Platner’s market price sharply upward.
Sep 20 2025
Early poll shows Platner leading primary field
Graham Platner jumps to 42%8%
A regional poll released by a local news outlet placed Platner ahead of Mills and other candidates, prompting early price gains for Platner and declines for the rest.
Sep 18 2025
Graham Platner gains momentum as anti-establishment candidate in Maine Senate race
Graham Platner surges to 53%19%
Graham Platner, an oyster farmer with no prior elected office, began gaining significant support as Democratic voters in Maine showed a preference for anti-establishment candidates, challenging the party's national leadership's preferred candidate, Janet Mills. This shift caused Platner's market price to rise sharply and Mills' to decline.
"Maine Democratic Senate Primary Winner" is a prediction market on Polymarket with 7 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Graham Platner" at 99%, followed by "Janet Mills" at 1%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 99¢ implies that the market collectively assigns a 99% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.
As of today, "Maine Democratic Senate Primary Winner" has generated $3 million in total trading volume since the market launched on Sep 15, 2025. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.
To trade on "Maine Democratic Senate Primary Winner," browse the 7 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.
The current frontrunner for "Maine Democratic Senate Primary Winner" is "Graham Platner" at 99%, meaning the market assigns a 99% chance to that outcome. The next closest outcome is "Janet Mills" at 1%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.
The resolution rules for "Maine Democratic Senate Primary Winner" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.
Yes. You don't need to trade to stay informed. This page serves as a live tracker for "Maine Democratic Senate Primary Winner." The outcome probabilities update in real-time as new trades come in. You can bookmark this page and check the comments section to see what other traders are saying. You can also use the time-range filters on the chart to see how the odds have shifted over time. It's a free, real-time window into what the market expects to happen.
Polymarket odds are set by real traders putting real money behind their beliefs, which tends to surface accurate predictions. With $3 million traded on “Maine Democratic Senate Primary Winner,” these prices aggregate the collective knowledge and conviction of thousands of participants — often outperforming polls, expert forecasts, and traditional surveys. Prediction markets like Polymarket have a strong track record of accuracy, especially as events approach their resolution date. For example, Polymarket has a one month accuracy score of 94%. For the latest stats on Polymarket’s prediction accuracy, visit the accuracy page on Polymarket.
To place your first trade on "Maine Democratic Senate Primary Winner," sign up for a free Polymarket account and fund it using crypto, a credit or debit card, or a bank transfer. Once your account is funded, return to this page, select the outcome you want to trade, enter your amount, and click "Trade." If you're new to prediction markets, click the "How it works" link at the top of any Polymarket page for a quick step-by-step walkthrough of how trading works.
On Polymarket, the price of each outcome represents the market's implied probability. A price of 99¢ for "Graham Platner" in the "Maine Democratic Senate Primary Winner" market means traders collectively believe there is roughly a 99% chance that "Graham Platner" will be the correct result. If you buy "Yes" shares at 99¢ and the outcome is correct, you receive $1.00 per share — a profit of 1¢ per share. If incorrect, those shares are worth $0.
The "Maine Democratic Senate Primary Winner" market is scheduled to resolve on or around Jun 9, 2026. This means trading will remain open and the odds will continue to shift as new information emerges until that date. The exact resolution timing depends on when the official result becomes available, as outlined in the "Rules" section on this page.
The "Maine Democratic Senate Primary Winner" market has an active community of 38 comments where traders share their analysis, debate outcomes, and discuss breaking developments. Scroll down to the comments section below to read what other participants think. You can also filter by "Top Holders" to see what the market's biggest traders are positioned on, or check the "Activity" tab for a real-time feed of trades.
Polymarket is the world's largest prediction market, where you can stay informed and profit from your knowledge of real-world events. Traders buy and sell shares on outcomes for topics ranging from politics and elections to crypto, finance, sports, tech, and culture, including markets like "Maine Democratic Senate Primary Winner." Prices reflect real-time, crowd-sourced probabilities backed by financial conviction, often providing faster and more accurate signals than polls, pundits, or traditional surveys.
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