Jeb Bush said Donald Trump discusses foreign policy like a reality show star and that support for the Republican front-runner will eventually wane. Bush also said he has little confidence in Trump's ability to appropriately handle America's nuclear weapons. "I have grave doubts, to be honest with you," Bush told CNN's Jake Tapper in an interview airing Sunday on "State of the Union." "He's not taking the responsibility, the possibility of being president of the United States really seriously. For him, it looks as though he's an actor playing a role of the candidate for president. Not boning up on...