Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) has wide leads over the Democratic presidential field in Michigan and Wisconsin but is facing a tighter race in Pennsylvania, according to a poll released Sunday.

Sanders holds a 17-point lead over his closest competitors in Wisconsin, based on the University of Wisconsin-Madison survey.

Sanders has 30 percent support in the battleground state, pollsters found. The rest of the top-tier Democratic candidates are lumped together within 1 percentage point of one another. Former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE and 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 both register 13 percent support in Wisconsin, while Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, 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 MORE (D-Mass.) and former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBipartisan praise pours in after Ginsburg's death Bogeymen 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 MORE trail closely behind with 12 percent support each.

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Sen. Amy Klobuchar Amy KlobucharThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill EPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates MORE (D-Minn.) has 9 percent support in Wisconsin.

The poll also found Biden, Buttigieg, Klobuchar, Sanders and Warren all beat President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE in general election match-ups in the battleground state. The poll did not include a Bloomberg contest against Trump.

Sanders, meanwhile, has a 9-point lead over his closest competitor in Michigan at 25 percent support.

Biden is in second in Michigan at 16 percent, trailed by Warren and Bloomberg at 13 percent each, based on the poll. Buttigieg is behind them at 11 percent, with Klobuchar trailing at 8 percent.

The five candidates also all beat Trump in match-ups in Michigan, based on the poll.

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In Pennsylvania, Sanders again leads the Democratic field but by a narrower 5-point margin with 25 percent.

Biden is in second place in Pennsylvania at 20 percent, with Bloomberg close behind at 19 percent, based on the poll.

Buttigieg is in fourth at 12 percent, with Warren at 9 percent and Klobuchar at 5 percent.

Biden and Sanders each have a small lead over Trump in match-ups against the president in Pennsylvania, based on the poll. Buttigieg, Klobuchar and Warren each tied Trump.

The survey polled 1,300 people in Michigan, 1,300 in Pennsylvania and 1,000 in Wisconsin. The margin of error for the full sample in each state ranges between 3 and 4 percentage points.