Oct 15 (Reuters) - Republican presidential candidate Donald Trump on Tuesday defended his protectionist trade policies and other fiscal proposals, dismissing suggestions that they could drive up the federal debt, antagonize allies and harm the U.S. economy. “We’re all about growth. We’re going to bring companies back to our country,” the former president said in a sometimes-tense interview at the Economic Club of Chicago. The interviewer, John Micklethwait, editor-in-chief of Bloomberg News,...