Illinois’s 4th Congressional District maintains a D+17 Partisan Voter Index, placing it among the most Democratic seats nationally and producing consistent 40-point margins in recent cycles. Incumbent Jesús “Chuy” García’s late withdrawal and endorsement of chief of staff Patty Garcia secured her position as the sole Democratic primary nominee, preserving party infrastructure and fundraising momentum against Republican Lupe Castillo, who has shown limited campaign activity. Independent candidacies by other Democrats could fragment the left-leaning vote, yet historical turnout patterns and the absence of competitive Republican organization keep the Democratic nominee as the clear frontrunner in trader assessments. Late developments such as a major scandal, health issue, or unusually high independent turnout would be required to alter the current consensus.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedIL-04 House Election Winner
IL-04 House Election Winner
$46,392 Vol.
$46,392 Vol.
Nov 3, 2026
Democratic Party
96%
Republican Party
4%
$46,392 Vol.
$46,392 Vol.
Nov 3, 2026
Democratic Party
$31,938 Vol.
96%
Republican Party
$14,454 Vol.
4%
This market will resolve according to the party of the candidate who wins the IL-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 4, 2026.
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/).Illinois’s 4th Congressional District maintains a D+17 Partisan Voter Index, placing it among the most Democratic seats nationally and producing consistent 40-point margins in recent cycles. Incumbent Jesús “Chuy” García’s late withdrawal and endorsement of chief of staff Patty Garcia secured her position as the sole Democratic primary nominee, preserving party infrastructure and fundraising momentum against Republican Lupe Castillo, who has shown limited campaign activity. Independent candidacies by other Democrats could fragment the left-leaning vote, yet historical turnout patterns and the absence of competitive Republican organization keep the Democratic nominee as the clear frontrunner in trader assessments. Late developments such as a major scandal, health issue, or unusually high independent turnout would be required to alter the current consensus.
This market will resolve according to the party of the candidate who wins the IL-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 4, 2026.
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/).
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/).
Market Opened: Jan 28, 2026, 11:08 AM ET
Volume
$46,392End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 11:08 AM ETResolver
0x2F5e3684c...This market will resolve according to the party of the candidate who wins the IL-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 4, 2026.
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/).Illinois’s 4th Congressional District maintains a D+17 Partisan Voter Index, placing it among the most Democratic seats nationally and producing consistent 40-point margins in recent cycles. Incumbent Jesús “Chuy” García’s late withdrawal and endorsement of chief of staff Patty Garcia secured her position as the sole Democratic primary nominee, preserving party infrastructure and fundraising momentum against Republican Lupe Castillo, who has shown limited campaign activity. Independent candidacies by other Democrats could fragment the left-leaning vote, yet historical turnout patterns and the absence of competitive Republican organization keep the Democratic nominee as the clear frontrunner in trader assessments. Late developments such as a major scandal, health issue, or unusually high independent turnout would be required to alter the current consensus.
This market will resolve according to the party of the candidate who wins the IL-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 4, 2026.
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/).
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/).
Volume
$46,392End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 11:08 AM ETResolver
0x2F5e3684c...Illinois’s 4th Congressional District maintains a D+17 Partisan Voter Index, placing it among the most Democratic seats nationally and producing consistent 40-point margins in recent cycles. Incumbent Jesús “Chuy” García’s late withdrawal and endorsement of chief of staff Patty Garcia secured her position as the sole Democratic primary nominee, preserving party infrastructure and fundraising momentum against Republican Lupe Castillo, who has shown limited campaign activity. Independent candidacies by other Democrats could fragment the left-leaning vote, yet historical turnout patterns and the absence of competitive Republican organization keep the Democratic nominee as the clear frontrunner in trader assessments. Late developments such as a major scandal, health issue, or unusually high independent turnout would be required to alter the current consensus.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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