The latest Marquette University poll finds Biden with 49 percent support and Trump 44 percent among all registered voters. This is mostly unchanged from a single poll in June, when Biden led by 6 points.
Among potential voters in Wisconsin, Biden leads by a margin of 48 to 42 percent in June, a slightly closer race than in the same poll in June, when he led by 8 points.
Polsters found that Democrats and Republicans are equally active, with about two-thirds from each party saying they are excited to vote. Only 37 percent of independents say they are enthusiastic about voting.
Twenty-six percent of voters also say they plan to vote in person on Election Day, while 35 percent say they will vote absentee and 12 percent who vote early and in person.
About two-thirds of Republicans say they will vote in person on election day, while 55 percent of Democrats say they will take advantage of absentee voting.
The Marquette University survey of 801 registered voters was conducted from August 4 to August 9 and had a margin of 3.9 percentage points. The margin of error in the poll of 675 potential voters is 4.2 percentage points.