Incumbent Democrat Jake Auchincloss maintains a dominant position in Massachusetts's 4th congressional district ahead of the November 3, 2026, general election. The seat carries a D+11 partisan voter index and has produced consistent double-digit Democratic margins in recent cycles, with nonpartisan forecasters rating the race Solid Democratic or Safe Democratic. Auchincloss faces only modest primary opposition from Jason Poulos on September 1, while the Republican nominee, Thomas Stalcup, has raised under $30,000 and confronts historical barriers in a district where GOP candidates have rarely exceeded low double digits. Trader consensus at 97% Democratic reflects these structural factors, including strong incumbency advantages and fundraising disparities. A late scandal, health issue, or national Republican surge could theoretically alter dynamics, though such shifts remain uncommon in this reliably Democratic district.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMA-04 House Election Winner
$46,864 Vol.
$46,864 Vol.
Democratic Party
97%
Republican Party
2%
$46,864 Vol.
$46,864 Vol.
Democratic Party
97%
Republican Party
2%
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...Incumbent Democrat Jake Auchincloss maintains a dominant position in Massachusetts's 4th congressional district ahead of the November 3, 2026, general election. The seat carries a D+11 partisan voter index and has produced consistent double-digit Democratic margins in recent cycles, with nonpartisan forecasters rating the race Solid Democratic or Safe Democratic. Auchincloss faces only modest primary opposition from Jason Poulos on September 1, while the Republican nominee, Thomas Stalcup, has raised under $30,000 and confronts historical barriers in a district where GOP candidates have rarely exceeded low double digits. Trader consensus at 97% Democratic reflects these structural factors, including strong incumbency advantages and fundraising disparities. A late scandal, health issue, or national Republican surge could theoretically alter dynamics, though such shifts remain uncommon in this reliably Democratic district.
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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