Former Arizona GOP Sen. Jeff Flake issued a scathing rebuke of those in his party who stand with President Trump during his impeachment. Flake, 56, who did not run for reelection in 2018, published an op-ed titled, "Jeff Flake: The president is on trial. So are my Senate Republican colleagues," in the Washington Post on Friday. "As we approach the time when you do your constitutional duty and weigh the evidence arrayed against the president, I urge you to remember who we are when we are at our best. And I ask you to remember yourself at your most idealistic,"...