One possible target for President Trump tonight in Phoenix is a US Senator from his own party.
Arizona's Republican US Senator Jeff Flake is the perfect model of past Republican figures: a gentlemanly family man who's happy to compromise and work closely with Democrats. He's also a never-Trump Republican who never gave in. Is that a factor in the President's decision to hold a rally tonight in Phoenix? McKay Coppins recently profiled Flake in the Atlantic.