Massachusetts's 9th congressional district maintains a solid Democratic lean, with partisan voting indices around D+6 and consistent historical support for the party in federal races. Incumbent Bill Keating, first elected in 2010, faces a Democratic primary on September 1, 2026, against limited challengers before the November general election against Republican nominee Tyler Macallister. Forecasters rate the contest Safe or Solid Democratic due to the district's composition across Cape Cod, the South Shore, and New Bedford suburbs, where Democratic performance has strengthened over time. Trader consensus at 95.7% for the Democratic nominee reflects the absence of competitive Republican infrastructure or polling momentum. A major scandal, Keating's withdrawal, or an unprecedented national partisan shift could alter outcomes, though such developments remain improbable based on current structural factors.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-updateMA-09 House Election Winner
$22,962 Vol.
$22,962 Vol.
Democratic Party
96%
Republican Party
5%
$22,962 Vol.
$22,962 Vol.
Democratic Party
96%
Republican Party
5%
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
Binuksan ang Market: Jan 28, 2026, 11:09 AM ET
Resolver
0x2F5e3684c...A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
Resolver
0x2F5e3684c...Massachusetts's 9th congressional district maintains a solid Democratic lean, with partisan voting indices around D+6 and consistent historical support for the party in federal races. Incumbent Bill Keating, first elected in 2010, faces a Democratic primary on September 1, 2026, against limited challengers before the November general election against Republican nominee Tyler Macallister. Forecasters rate the contest Safe or Solid Democratic due to the district's composition across Cape Cod, the South Shore, and New Bedford suburbs, where Democratic performance has strengthened over time. Trader consensus at 95.7% for the Democratic nominee reflects the absence of competitive Republican infrastructure or polling momentum. A major scandal, Keating's withdrawal, or an unprecedented national partisan shift could alter outcomes, though such developments remain improbable based on current structural factors.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-update

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