Candidates warn of dire consequences if rival wins

Latest tracking poll shows Trump is edging ahead of Clinton for the first time since May

Donald Trump could draw the United States into nuclear war, Hillary Clinton warns. Clinton would plunge the country into a constitutional crisis, he says.

As the caustic presidential race lurches toward the finish line, each candidate is aggressively casting the other as a catastrophic choice for the White House. Making an affirmative case about his or her qualifications and vision has become a secondary priority.