Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails County GOP in Minnesota shares image comparing Sanders to Hitler Holder: 'Time to make the Electoral College a vestige of the past' MORE's lead over Donald Trump Donald John TrumpREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails Trump urges North Korea to denuclearize ahead of summit Venezuela's Maduro says he fears 'bad' people around Trump MORE has narrowed, according to the latest national poll.

Clinton leads the GOP nominee 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.

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Clinton's lead is even smaller in a four-way matchup. In that scenario, Clinton leads by just 2 points, 42 to 40 percent.

Clinton has seen a tightening of polls recently as she battles criticism over her "basket of deplorables" comment and the delayed release of her pneumonia diagnosis over the weekend.

Her lead in the NBC survey was 10 points about five weeks ago.

Since then, Trump has made up ground among independents who don't lean toward either major party.

Clinton and Trump have similar favorability numbers in the poll, though both are viewed unfavorably by a majority of registered voters.

Thirty-eight percent have a favorable impression of Trump and 39 percent have a favorable impression of Clinton, while 59 percent view Clinton unfavorably and 60 percent view Trump unfavorably.

The survey of 16,220 registered voters was conducted online Sept. 5–11 with an estimated margin of error of 1.1 percentage points.