People supporting Donald Trump's presidential bid will "feel betrayed" should the presumptive Republican nominee's campaign promises go unsatisfied, former Florida Gov. Jeb Bush predicted Monday. Speaking to MSNBC contributor Nicolle Wallace, who served as his press secretary in Tallahassee, Bush called Trump "to his credit ... very smart at exploiting these kind of opportunities." "He's a master at understanding how the media works — more than anybody I've ever seen in politics. Kudos to him, for kind of creating the environment and then manipulating the environment to his effect," Bush said in the interview airing in full Monday night. There...