MIAMI (AP) -- Republican presidential candidate Jeb Bush says rival Donald Trump is not prepared to be the nation's commander in chief.
Bush says Trump is "uninformed" on major issues facing the U.S, especially defense and foreign affairs.
During an appearance on CBS' "Face the Nation" on Sunday, Bush says the 2016 front-runner is "not a serious leader." He says Trump has offered conflicting opinions on his strategy toward Syria and combatting the Islamic State group.
Bush's criticism of Trump comes a day after the billionaire businessman campaigned in the former Florida governor's home state and dismissed Bush as a serious challenger.
Trump told thousands at a rally in Sarasota, Florida, that he would easily win the March 15 Florida primary because "I'm leading by a lot already."