Hillary Clinton took a swipe at Republican presidential contender Donald Trump for flying into parts of the country on a "big jet," painting him as out-of-touch. "At some point, if you want to be president of the United States, you’ve got to get familiar with the United States," she quipped. "I kind of don't think that kind of puts you in touch with what's going on," Clinton added. "I have spent now more than a year talking and listening to people." Left unmentioned: Clinton's Democratic primary opponent. Sen. Bernie Sanders of Vermont. Sanders remains in the race, but Clinton has in recent days pivoted sharply away from him.