Trump-Backed Arizona Sheriff Wins GOP Primary for Biggs’ House Seat

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Mark Lamb, an Arizona sheriff with President Donald Trump’s endorsement, secured victory in Tuesday’s Republican primary for Arizona’s fifth congressional district seat. The win sets Lamb on course to claim the House seat vacated by outgoing Rep. Andy Biggs, R-Ariz., in a district with a strong history of supporting GOP candidates.

Lamb centered his campaign around traditional conservative themes, emphasizing what he characterized as the need to preserve American values. “We gotta make sure our grandchildren and our great-grandchildren have the same freedoms that we have,” Lamb stated in campaign messaging, framing his candidacy as part of a broader movement to protect the nation’s cultural identity.

Biggs announced last year that he would seek the Arizona governor’s office rather than defend his House seat. “Arizona has a bright future, but we will need strong leadership to reach its full potential,” Biggs said in a statement, citing his experience at both state and federal levels as qualification for the gubernatorial race.

The district ranks among Arizona’s most solidly Republican areas, a status reinforced following 2022 redistricting. Biggs won his final reelection in 2024 with 60.4 percent of the vote against Democratic challenger Katrina Schaffner’s 39.6 percent.

Lamb echoed Biggs’ hard-line stance on immigration and federal governance. He criticized what he characterized as the Biden administration’s approach to border security, arguing that “hundreds of thousands of people” from around the world had entered the country illegally while the government “rolled out the red carpet for people that broke our law.”

Lamb’s campaign faced complications earlier this year when an Arizona investigation alleged he had a history of transmitting inappropriate images to women outside his marriage. His wife, Janel Lamb, dismissed the allegations as political sabotage, writing on Facebook that a “massive smear campaign” would not deter their commitment to their principles.

Lamb now advances to the November 3 general election, where he is heavily favored in this reliably Republican district.

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