PITTSBURGH — A campaign shadow lifted by the FBI, Hillary Clinton on Monday promised to build a “big-hearted” America out of the wreckage of a strikingly divisive presidential race. Donald Trump told his supporters this was their last chance to buck a broken political system. With the end in sight, both candidates set exhausting schedules for the final day of a campaign that has wearied the entire nation, each visiting major cities deep into the night. Clinton delivered a closing argument that began to look ahead to how she would govern, promising she would listen even to those voters who rejected her and making a late plea for “more love and kindness.” “We have got to rise above all of this,” she told a cheering crowd in Pittsburgh.