Embattled Sen. Jeff Flake (R-Ariz.) will retire after his current term expires, he announced on Tuesday. He took to the Senate floor to deliver a full-throated denunciation of Trump. "We must never adjust to the coarseness of our dialogue, with the tone set up at the top," Flake said. "We must never accept the deadly sundering of our country. The personal attacks, threats against principles and freedoms and institutions, and flagrant disregard for decency."