DES MOINES, Iowa (AP) — Allies of President Donald Trump have been quick to threaten primary challengers for Republican senators who don’t back Trump’s Cabinet picks and legislative priorities. Five senators in particular have drawn early attention. They are Joni Ernst of Iowa, Thom Tillis of North Carolina, Bill Cassidy of Louisiana, John Cornyn of Texas, and Lindsey Graham of South Carolina. But all bring their own strengths and a history of winning in their states.… Continue Reading