Vulnerable Republican wins GOP primary in Arizona toss-up district Dems aim to flip blue

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 by less than 1 percentage point in...