Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE leads Republican rival Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE by 2 points in a new national poll, within the survey's margin of error.

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Clinton leads Trump, 42 percent to 40 percent, in a two-way race in the Morning Consult poll released Sunday morning.

Just three weeks ago, Clinton led Trump by 7 points in the same poll, 44 percent to 37 percent.

When third-party candidates are factored into the new poll, Clinton maintains a 2-point lead over Trump, with 38 percent support for the former secretary of State, 36 percent for the real estate mogul, 9 percent for Libertarian Party nominee Gary Johnson Gary Earl JohnsonWhat the numbers say about Trump's chances at reelection Presidential race tightens in Minnesota as Trump plows resources into state The Hill's Campaign Report: Biden condemns violence, blames Trump for fomenting it l Bitter Mass. primaries reach the end l Super PAC spending set to explode MORE and 4 percent for Green Party nominee Jill Stein.

Approximately 13 percent of respondents still say they are undecided.

The Morning Consult poll of 2,001 registered voters, conducted Sept.1 –2, has a margin of error of 2 percentage points.

Clinton leads Trump by about 4 points nationally, according to the RealClearPolitics average of polls.

— This report was updated at 9:23 a.m.