Former Pinal County Sheriff Mark Lamb dominates trader consensus at 88% implied probability to win Arizona's 5th Congressional District Republican primary on July 21, driven by consistent late-2025 polling leads of 49-55% among likely GOP voters, President Trump's November endorsement, and backing from Reps. Paul Gosar, Eli Crane, Speaker Mike Johnson, and Majority Leader Steve Scalise. Recent developments bolstering his position include former state Rep. Travis Grantham's mid-March campaign suspension for Air National Guard active duty and ex-NFL kicker Jay Feely's withdrawal to run in AZ-01, consolidating support in this deep-red, open-seat race (R+10 PVI) vacated by Rep. Andy Biggs for governor. Absent late-breaking scandals or surges by challengers like Daniel Keenan, Lamb's name recognition and fundraising edge sustain his frontrunner status.
Experimental AI-generated summary referencing Polymarket data · UpdatedMark Lamb 89%
Travis Grantham 6.6%
Jay Feely 5.0%
Mark Lamb
89%
Travis Grantham
7%
Jay Feely
5%
Mark Lamb 89%
Travis Grantham 6.6%
Jay Feely 5.0%
Mark Lamb
89%
Travis Grantham
7%
Jay Feely
5%
If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".
The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/.
Any replacement of the nominee before election day will not change the resolution of the market.
Market Opened: Nov 25, 2025, 5:27 PM ET
Resolver
0x2F5e3684c...If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".
The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/.
Any replacement of the nominee before election day will not change the resolution of the market.
Resolver
0x2F5e3684c...Former Pinal County Sheriff Mark Lamb dominates trader consensus at 88% implied probability to win Arizona's 5th Congressional District Republican primary on July 21, driven by consistent late-2025 polling leads of 49-55% among likely GOP voters, President Trump's November endorsement, and backing from Reps. Paul Gosar, Eli Crane, Speaker Mike Johnson, and Majority Leader Steve Scalise. Recent developments bolstering his position include former state Rep. Travis Grantham's mid-March campaign suspension for Air National Guard active duty and ex-NFL kicker Jay Feely's withdrawal to run in AZ-01, consolidating support in this deep-red, open-seat race (R+10 PVI) vacated by Rep. Andy Biggs for governor. Absent late-breaking scandals or surges by challengers like Daniel Keenan, Lamb's name recognition and fundraising edge sustain his frontrunner status.
Experimental AI-generated summary referencing Polymarket data · Updated

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