
Mark Lamb (R) defeated Daniel Keenan (R) in the Republican primary for Arizona's 5th Congressional District on July 21, 2026. Incumbent Rep. Andy Biggs (R), who was first elected in 2016, ran for governor of Arizona rather than for another term. Keenan led in fundraising, while Lamb led in noteworthy endorsements. As of July 1, 2026, Keenan raised $1,851,302 to Lamb's $1,222,217. In terms of noteworthy endorsements,…

Daniel Keenan (R) and Mark Lamb (R) are running in the Republican primary for Arizona's 5th Congressional District on July 21, 2026. Incumbent Rep. Andy Biggs (R), who was first elected in 2016, is running for governor of Arizona rather than for another term. Keenan leads in fundraising, while Lamb leads in noteworthy endorsements. As…