Incumbent Rep. Michael Guest's unopposed victory in the March 10, 2026, Republican primary, securing 44,553 votes versus Democrat Michael Chiaradio's scant 2,590 in his uncontested primary, underscores trader consensus on a Republican lock in solidly Republican MS-03 (Cook PVI R+14). Guest's history of dominance—including a 2024 unopposed general election win and 70.7% in 2022—paired with his $942,000 cash-on-hand edge over Chiaradio's $16,000, drives the 92.5% implied probability for Republicans ahead of the November 3 general election. Scenarios to challenge this include a major Guest scandal, health issue, or national Democratic midterm wave boosting turnout in this Trump-won-by-29-point district.
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
$23,965 Vol.
$23,965 Vol.
Republican Party
93%
Democratic Party
6%
$23,965 Vol.
$23,965 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, 2026, Republican primary, securing 44,553 votes versus Democrat Michael Chiaradio's scant 2,590 in his uncontested primary, underscores trader consensus on a Republican lock in solidly Republican MS-03 (Cook PVI R+14). Guest's history of dominance—including a 2024 unopposed general election win and 70.7% in 2022—paired with his $942,000 cash-on-hand edge over Chiaradio's $16,000, drives the 92.5% implied probability for Republicans ahead of the November 3 general election. Scenarios to challenge this include a major Guest scandal, health issue, or national Democratic midterm wave boosting turnout in this Trump-won-by-29-point 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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