Mark Lamb, a sheriff with the backing of President Donald Trump, won a GOP primary on Tuesday evening to fill the seat of outgoing Rep. Andy Biggs, R-Ariz., in the Grand Canyon State’s fifth congressional district. The victory puts Lamb on a trajectory to win the seat in November which, in the past, has heavily leaned Republican. Lamb has framed his race as part of a larger effort...

President Donald Trump’s kingmaker status in Republican primaries was on the line Tuesday in Arizona’s GOP gubernatorial nomination showdown – and the president easily passed the test. Rep. Andy Biggs, a former House Freedom Caucus chair who landed the president’s endorsement, captured the GOP nomination for Arizona governor with more than 70% of the vote, the Associated Press reported with just under 50% of the votes counted Tuesday...

Rep. Juan Ciscomani, R-Ariz., clinched the GOP primary nomination in a battleground district Democrats see as key to retaking the House. Ciscomani, a moderate Republican seeking a third House term, ran unopposed with President Donald Trump’s endorsement. The southeastern Arizona district, which spans Tucson’s suburbs and stretches to the U.S.-Mexico border, is one of the most hotly contested House races in the country. Trump carried the swing seat...