HANFORD,Calif. It’s been a year now, but in this Central Valley farm town, like the nation, the divide has only grown. Todd Cotta was working in his gun shop when a customer came in with the news about David Valadao, the Republican congressman for whom Cotta had campaigned across Kings County and beyond just months before. Bewildered, Cotta turned to his phone and tapped in a text message to a man he considered a friend. “Hey David. Somebody’s spreading a nasty (rumor) that you voted to impeach Trump,” Cotta wrote. “I certainly hope that’s not true.” Within seconds, Valadao responded....