Republican presidential nominee Donald TrumpDonald TrumpTexas announces election audit in four counties after Trump demand Schumer sets Monday showdown on debt ceiling-government funding bill Pennsylvania AG sues to block GOP subpoenas in election probe MORE has overtaken Democratic rival Hillary ClintonHillary Diane Rodham ClintonHeller won't say if Biden won election Whitmer trailing GOP challenger by 6 points in Michigan governor race: poll GOP political operatives indicted over illegal campaign contribution from Russian national in 2016 MORE for the first time since May in the ABC News/Washington Post tracking poll.
Trump has a 1-point lead over the former secretary of State, 46 to 45 percent, as of Tuesday morning.
Libertarian nominee Gary JohnsonGary Earl JohnsonBiden broadened Democratic base, cut into Trump coalition: study New Mexico lawmakers send recreational marijuana bills to governor Judge throws out murder convictions, releases men jailed for 24 years MORE registers at a new low of 3 percent, while Green Party nominee Jill Stein rounds out the field with 2 percent.
Fifty-three percent of likely voters have "strong enthusiasm" for Trump, according to the poll, while 45 percent feel the same about Clinton.
Clinton led Trump by 1 point, 46 percent to 45 percent, in the same poll over the weekend. She held a 12-point lead, 50 to 38 percent, in the poll just more than one week ago.
Voters voiced more enthusiasm for Clinton's campaign, with 52 percent saying they had "strong enthusiasm" for her and 49 percent stating the same of Trump.
The Washington Post/ABC News conducted its latest poll of 1,128 likely voters via cellphone and landline telephone interviews from Oct. 27 to 30. It has a margin of error of 3 percentage points.
Clinton leads Trump by about 2 points nationwide, according to the latest RealClearPolitics average of surveys.
Recent polling shows a tightening race between Clinton and Trump at both the national and state levels just one week from Election Day.
Clinton is under fire following a weekend of negative headlines over a new FBI probe into emails from the private server she used while secretary of State.
FBI Director James Comey told lawmakers in a letter last Friday that the bureau had found fresh emails that may prove "pertinent" to its investigation of Clinton's emails.
The new emails were discovered during an unrelated probe of former Rep. Anthony Weiner (D-N.Y.), the estranged husband of longtime Clinton aide Huma Abedin.
This report was updated at 7:36 a.m.