Bond guru Jeff Gundlach trusts his instincts when it comes to his investments. Now he has a prediction about the presidential race: Donald Trump will win. The CEO of DoubleLine, which manages $84 billion for clients, told CNBC he's apolitical but said, "I think it's important for investors to deal with reality."In fact, he said the presumptive Republican presidential nominee is just like another man many in the GOP idolize: former President Ronald Reagan. "Reagan was a debt-based economic guy and I think Trump will be," Gundlach noted. "It will probably look like it's working at first. The question is,...