Former Vice President Joe Biden
Joe BidenBiden, Warren team up in new video to surprise supporters with personal calls Five unanswered questions on COVID-19 and the 2020 election Biden campaign calls Eric Trump's coronavirus comments 'unbelievably reckless' MORE leads President Trump
Donald John TrumpTrump tears into '60 Minutes' after segment with whistleblower Bright James Woods defends Trump: He 'loves America more than any president in my lifetime' Kansas governor to meet with Trump at White House MORE by nine points among Wisconsin voters while Sen. Bernie Sanders
Bernie SandersSanders pushes back on doubts supporters will back Biden Sunday shows - Trump trade adviser knocks Obama, whistleblower, CDC Sanders says coronavirus relief bill should include paycheck guarantee MORE (I-Vt.) leads by four points, according to a new Marquette University Law poll released on Wednesday.
Fifty-one percent of voters in the state said they supported Biden, while only 42 percent voiced support for Trump, according to the survey.
The same survey found that Sanders led Trump by four points, or 48 percent to 44 percent.
Meanwhile, the president is neck-and-neck with Sen. Elizabeth Warren
Elizabeth WarrenWarren says death of brother from COVID-19 'feels like something that didn't have to happen' Biden, Warren team up in new video to surprise supporters with personal calls Hillicon Valley: Commerce announces new Huawei restrictions | Russian meddling report round five | Google's ad business in spotlight MORE (D-Mass.), with both receiving 45 percent support.
Trump was also tied with Sen. Kamala Harris
Kamala Devi HarrisTrump and Biden signal bitter general election with latest attack ads Obama addresses racial disparities, Ahmaud Arbery killing in speech to HBCU graduates Hickenlooper endorses Biden for president MORE (D-Calif.), with both coming in at 44 percent support.
Wisconsin will likely be a must-win state for Democrats in 2020 given that President Trump flipped the state from blue to red, helping propel him to his surprise victory in 2016.
Biden also led the Democratic primary field in Wisconsin, according to the poll, with 28 percent of those surveyed naming him as their first choice.
Sanders was the first choice of 20 percent of the same pool of respondents, while Warren was the first choice of 17 percent of respondents.
Sanders had won Wisconsin the 2016 Democratic primary race with 56 percent of the vote.
Meanwhile, the economy, likely a key electoral issue in 2020, elicited split views from voters in Wisconsin. Forty-nine percent of respondents said they approved of the president's handling of the economy, while 50 percent said they disapproved.
The Marquette University Law School poll was conducted from August 25-29, 2019 among 800 registered Wisconsin voters. The margin of error is plus or minus 3.9 percentage points. Among registered Democrats, Democratic-leaners, and independents, the margin of error is plus or minus 5.3 percentage points.
