Former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE and Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) are polling neck and neck among Wisconsin Democratic primary voters, according to a new Fox News poll.

Twenty-three percent of Wisconsin Democratic primary voters said they supported Biden, down from his 28 percent support among the group in early October.

Sanders stands at 21 percent in the most recent poll, up from 17 percent.

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Meanwhile, Sen. Elizabeth Warren Elizabeth WarrenWarren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon No new taxes for the ultra rich — fix bad tax policy instead MORE (D-Mass.) saw her support shrink from 22 percent to 13 percent in the Badger State. Former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq A socially and environmentally just way to fight climate change MORE clocked in at 9 percent support, while former New York City Mayor Michael Bloomberg Michael BloombergTop Democratic super PAC launches Florida ad blitz after Bloomberg donation The Hill's 12:30 Report - Presented by Facebook - Latest with the COVID-19 relief bill negotiations The Memo: 2020 is all about winning Florida MORE has 7 percent support.

Wisconsin will be pivotal for Democrats in 2020 as they look to take back the state after President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE flipped it in 2016.

Sanders is rising in a number of recent polls ahead of the first Democratic nominating votes, threatening Biden's front-runner status.

The Vermont progressive has begun stepping up his attacks on Biden, particularly taking aim at his 2002 Iraq War vote.

"Joe Biden voted and helped lead the effort for the war in Iraq, the most dangerous foreign policy blunder in the modern history of this country,” Sanders said in an interview with CNN’s Anderson Cooper on Monday.

The Fox News poll was conducted Jan. 5-8 among 1,504 Wisconsin voters, including 671 likely participants in the state's Democratic primary. The margin of error is plus or minus 3.5 percentage points for Democratic primary voters.