Trader consensus heavily favors the Democratic Party at 93.5% for Massachusetts' 4th Congressional District House seat, driven by the district's Solid D rating from Cook Political Report (D+11 PVI) and incumbent Rep. Jake Auchincloss's strong reelection position after opting against a Senate bid last fall. Recent Democratic primary entrant Ihssane Leckey, a former financial regulator mounting her second challenge in early February, poses no evident threat to the party's general election hold given incumbency advantages and historical primary win rates. No prominent Republican candidates have emerged, reinforcing the lopsided partisan lean from past cycles with double-digit Democratic margins. Shifts could arise from a high-profile GOP recruit, national midterm tailwinds, or unforeseen scandal ahead of the September 1 primaries and November 3 general election.
Experimental AI-generated summary referencing Polymarket data · UpdatedMA-04 House Election Winner
MA-04 House Election Winner
Democratic Party
94%
Republican Party
6%
Democratic Party
94%
Republican Party
6%
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, 11:09 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...Trader consensus heavily favors the Democratic Party at 93.5% for Massachusetts' 4th Congressional District House seat, driven by the district's Solid D rating from Cook Political Report (D+11 PVI) and incumbent Rep. Jake Auchincloss's strong reelection position after opting against a Senate bid last fall. Recent Democratic primary entrant Ihssane Leckey, a former financial regulator mounting her second challenge in early February, poses no evident threat to the party's general election hold given incumbency advantages and historical primary win rates. No prominent Republican candidates have emerged, reinforcing the lopsided partisan lean from past cycles with double-digit Democratic margins. Shifts could arise from a high-profile GOP recruit, national midterm tailwinds, or unforeseen scandal ahead of the September 1 primaries and November 3 general election.
Experimental AI-generated summary referencing Polymarket data · Updated
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