A day before the August recess, when Rep. Mark Meadows announced a legislative move to strip Speaker John A. Boehner of his gavel, few would have predicted that Donald Trump would be the summer’s biggest political story. But with the billionaire developer consistently topping the polls, and with most theories on his ascendance citing a general disgust with business as usual in Washington, Meadows sees Trump as a harbinger for his colleagues in the House. “The Trump phenomenon is not just with Donald Trump; it’s with re-election with members as well,” Meadows told CQ Roll Call Wednesday, “and there’s a...