A Trump-backed Arizona candidate faces tough House primary after sex scandals
Politics — 2026-07-16 11:00:00 — www.politico.com
Donald Trump’s Endorsement Tested Amid Scandal in Arizona House Race
The power of Donald Trump’s endorsement is under scrutiny in Arizona’s 5th Congressional District, where Republican Daniel Keenan is challenging Trump-backed candidate Mark Lamb, the former Pinal County sheriff, in a race clouded by scandal.
Trump’s Influence and Endorsement
The central issue in the race is whether Trump’s support can outweigh a series of damaging allegations against Lamb. According to the 
, Trump’s endorsement is seen as the most influential factor in the district, with former Rep. Matt Salmon stating, “I’ve never seen in Republican politics in my life a stronger endorsement than Trump’s. And I think that the rank-and-file within the Republican party would rather do anything than cross Trump.”
Despite the controversies surrounding Lamb, Trump recently reinforced his endorsement in a social media post, choosing not to address the scandals directly. This move underscores Trump’s continued willingness to support candidates facing serious allegations, a pattern that has played out in other races this year.
False Claims About the 2020 Election
The excerpt also highlights Trump’s ongoing promotion of false claims regarding the 2020 presidential election. Keenan is attacking Lamb for testifying that there was no fraud and that Trump lost the election, a position that contradicts Trump’s repeated, baseless assertions that the election was stolen. Trump’s false claims have become a litmus test for Republican candidates, with loyalty to his narrative often outweighing other considerations among GOP primary voters.
Impact on the GOP and Voter Sentiment
The race is a test of whether Trump’s endorsement can shield candidates from scandal or if voters will prioritize character and accountability. While Lamb’s campaign has not addressed the allegations in paid advertising, his supporters remain confident, citing Trump’s backing as a decisive factor. Meanwhile, Keenan is spending heavily to publicize the accusations and challenge the notion that Trump’s support guarantees victory.
Conclusion
The Arizona 5th District primary is a microcosm of the broader struggle within the Republican Party: the tension between Trump’s influence, the persistence of his false election claims, and the growing scrutiny of candidates’ personal conduct. As the race unfolds, it will reveal whether Trump’s endorsement remains the ultimate seal of approval in GOP politics, even in the face of scandal and fact-checked falsehoods.
Source: https://www.politico.com/news/2026/07/16/mark-lamb-arizona-trump-scandals-01000409