**Arizona's 5th Congressional District leans strongly Republican (R+13 PVI, Trump +23 in 2020), driving trader consensus to an 80.5% implied probability for a GOP House election winner despite the open seat.** Incumbent Rep. Andy Biggs launched a gubernatorial bid last year, vacating the position, but former Pinal County Sheriff Mark Lamb secured President Trump's endorsement in November 2025 and leads GOP primary polls, with recent FEC reports through March 31 showing Republicans' fundraising dominance over a fragmented Democratic field including Brian Nowicki. No general election polls have emerged, but the July 21 primary looms as a key event to nominate Lamb or a strong conservative successor in this suburban East Valley battleground. National midterm dynamics and Arizona's swing-state status introduce modest uncertainty reflected in the 14.5% Democratic odds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAZ-05 House Election Winner
AZ-05 House Election Winner
Republican Party
80%
Democratic Party
15%
Republican Party
80%
Democratic Party
15%
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 27, 2026, 11:54 PM 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...**Arizona's 5th Congressional District leans strongly Republican (R+13 PVI, Trump +23 in 2020), driving trader consensus to an 80.5% implied probability for a GOP House election winner despite the open seat.** Incumbent Rep. Andy Biggs launched a gubernatorial bid last year, vacating the position, but former Pinal County Sheriff Mark Lamb secured President Trump's endorsement in November 2025 and leads GOP primary polls, with recent FEC reports through March 31 showing Republicans' fundraising dominance over a fragmented Democratic field including Brian Nowicki. No general election polls have emerged, but the July 21 primary looms as a key event to nominate Lamb or a strong conservative successor in this suburban East Valley battleground. National midterm dynamics and Arizona's swing-state status introduce modest uncertainty reflected in the 14.5% Democratic odds.
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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