Incumbent Rep. Michael Guest's unopposed victory in the March 10 Republican primary has reinforced trader consensus on a Republican hold in Mississippi's 3rd Congressional District, a solidly Republican seat with an R+14 Cook Partisan Voter Index. Guest's commanding fundraising lead—$942,000 cash-on-hand versus Democrat Michael Chiaradio's $16,000 as of late March—combined with historical blowouts (unopposed 100% in 2024, 71%-29% in 2022) and forecaster ratings of Solid Republican underpin the 92.5% implied probability. No recent polls exist, and no major developments have emerged in the past 30 days. Late-breaking scandals, legal challenges, health events, or a massive national Democratic wave could shift odds ahead of the November 3 general election.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMS-03 House Election Winner
MS-03 House Election Winner
$23,593 Vol.
$23,593 Vol.
Republican Party
93%
Democratic Party
6%
$23,593 Vol.
$23,593 Vol.
Republican Party
93%
Democratic 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, 11:10 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 Rep. Michael Guest's unopposed victory in the March 10 Republican primary has reinforced trader consensus on a Republican hold in Mississippi's 3rd Congressional District, a solidly Republican seat with an R+14 Cook Partisan Voter Index. Guest's commanding fundraising lead—$942,000 cash-on-hand versus Democrat Michael Chiaradio's $16,000 as of late March—combined with historical blowouts (unopposed 100% in 2024, 71%-29% in 2022) and forecaster ratings of Solid Republican underpin the 92.5% implied probability. No recent polls exist, and no major developments have emerged in the past 30 days. Late-breaking scandals, legal challenges, health events, or a massive national Democratic wave could shift odds ahead of the November 3 general election.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions