Mark Lamb Wins Arizona GOP House Primary Despite Misconduct Allegations
Mark Lamb was projected the winner of the Republican primary in Arizona's 5th Congressional District on Tuesday, July 21, 2026, positioning him to replace outgoing Rep. Andy Biggs in a safely Republican seat.[1]
Returns showed Lamb defeated construction business owner Daniel Keenan.[1] Keenan spent more than $1.5 million of his own money on the campaign.[1] Lamb's campaign denies allegations published by The Arizona Republic that multiple women reported explicit messages, nude photos, intimidation and orchestrated sexual encounters.[1] President Donald Trump endorsed Lamb, pressured another primary rival to switch districts, and reaffirmed his support earlier in July.[1]
Mark Lamb is a former sheriff who ran for the open seat after Rep. Andy Biggs opted to run for governor.[1] The Arizona Republic's investigation published the allegations against Lamb before the primary, and Lamb's campaign called the reporting false.[1]
With the primary win secured, Lamb advances as the Republican nominee to November's general election in a district long held by Republicans and considered safely GOP.[1]
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📌 Key Facts
- On Tuesday, July 21, 2026, the AP projected former sheriff Mark Lamb winner of the GOP primary in Arizona's 5th Congressional District.
- The victory positions Lamb to replace outgoing Republican Rep. Andy Biggs, who is running for governor, in a safely Republican district.
- Lamb defeated construction business owner Daniel Keenan, who spent more than $1.5 million of his own money on the campaign.
- An Arizona Republic investigation reported multiple women’s allegations of explicit messages, nude photos, intimidation, and orchestrated sexual encounters, which Lamb’s campaign denies.
- President Donald Trump endorsed Lamb, pressured another primary rival to switch districts, and reaffirmed his endorsement earlier in July 2026.
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