Hillary Clinton leads GOP nominee Donald Trump by 4 points, 48 to 44 percent, among registered voters in the NBC News/Survey Monkey tracking poll released Tuesday morning, down 2 points from last week. Clinton’s lead shrinks again to just 2 points (42 to 40 percent) in a four-way matchup with Libertarian nominee Gary Johnson (11 percent) and Jill Stein (4 percent).