donald trump joe biden split
CNN  — 

Former Vice President Joe Biden leads President Donald Trump in a hypothetical head-to-head matchup in Wisconsin, according to a Marquette University Law School poll released on Wednesday.

Biden is up over Trump by 51% to 42% among registered voters in Wisconsin. The President also trails Sen. Bernie Sanders of Vermont, who tops Trump 48% to 44%, just barely outside the margin of error.

Trump is tied against Sens. Elizabeth Warren of Massachusetts (45% each) and Kamala Harris of California (44% each).

Numbers this far out from a general election are hard to read, and could change between now and November 2020. They should be thought of as a snapshot in time rather than a predictor of the future.

Among the Democratic candidates, Biden leads the pack with 28% of registered Democrats, Democratic-leaning independents and independents who don’t lean toward either party saying he was their first choice, followed by 20% for Sanders and 17% for Warren. Sanders beat out former Secretary of State Hillary Clinton in the 2016 Wisconsin Democratic primary, 57% to 43%.

South Bend, Indiana, Mayor Pete Buttigieg received 6% support in the poll, followed by Harris at 3% and businessman Andrew Yang with 2%. All other candidates received 1% or less in the poll. More than 1 in 10 voters (13%) said they didn’t know who their first choices for the Democratic nominee were.

Biden is by far the most favorable candidate: 70% of the Democratic sample had a positive opinion of him, followed by 63% for Sanders, 53% for Warren, 37% for Buttigieg and 35% for Harris.

“Large portion of WI Dem voters don’t have a favorable or unfavorable opinion of prez candidates yet, other than Biden and Sanders,” Charles Franklin, director of the MU Law poll, said in a tweet.

Just slightly more approve of the job Trump is doing than plan to vote for him in 2020 at this point. Trump receives a higher approval rating in Wisconsin than he does nationally: 45% approve of the job he’s doing as President and 53% disapprove – relatively unchanged since April (46% approved, 52% disapproved). His favorable was just slightly lower: 42% favorable, 53% unfavorable.

The Marquette University Law School poll was conducted by phone from August 25 through 29 among a random sample of 800 registered voters with a margin of sampling error of plus or minus 3.9 percentage points. The survey includes a sample of 444 registered Democrats, independents who lean Democratic and pure independents, with a margin of sampling error of plus or minus 5.3 percentage points.