Costello was one of the most blunt, but he's not the only Republican retiring from Congress to point the finger at Trump for the decision to leave politics. Sen. Jeff Flake (R., Ariz.) made his whole retirement speech about Trump, specifically the damage he feels the president is inflicting not just on his party but on democracy. "There are times when we must risk our careers in favor of our principles," he said on the Senate floor. "Now is such a time."