Hillary Clinton and Donald Trump are neck-and-neck in a new national tracking poll out Tuesday morning. According to the latest Washington Post-ABC News Tracking Poll, 46 percent of likely voters are supporting Trump while 45 percent are behind Clinton. Although Trump's single-point advantage over Clinton is statistically negligible, it is his first lead in an ABC/Post poll since May. Clinton’s lead diminished and then vanished as FBI Director James Comey announced Friday that his bureau would investigate new emails possibly related to Clinton's use of a private email server.