When asked who he would vote for if the presidential race comes down to Hillary Clinton and Donald Trump, the former mayor of Los Angeles and a longtime Republican establishment figure, Dick Riordan, says: "I would probably go find a deserted island." "I think Hillary is disgusting," said Riordan, a wealthy investor who has exceeded $500,000 in political donations throughout his career. "And I think Trump is crazy," Riordan added in a telephone interview Monday. Riordan is not alone. In conversations over the past month, GOP establishment donors have confided to The Hill that for the first time in recent...