Poll: Trump leads top 2020 Democrats in Wisconsin

President TrumpDonald John TrumpLawmakers prep ahead of impeachment hearing Democrats gear up for high-stakes Judiciary hearing Warren says she made almost M from legal work over past three decades MORE leads top 2020 Democratic White House hopefuls in theoretical match-ups in Wisconsin, a poll released Wednesday found.

Former Vice President Joe BidenJoe BidenBiden: Buttigieg 'doesn't have significant black support even in his own city' Biden: 'I'd add' Warren to my list of potential VP picks How can top Democrats run the economy with no business skill? MORE, Sens. Bernie SandersBernie SandersHow can top Democrats run the economy with no business skill? Biden rallies with John Kerry in early primary states Buttigieg campaign says 2000 people attended Iowa rally MORE (I-Vt.) and Elizabeth WarrenElizabeth Ann WarrenBiden: 'I'd add' Warren to my list of potential VP picks Warren says she made almost M from legal work over past three decades How can top Democrats run the economy with no business skill? MORE (D-Mass.), and South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegBiden: Buttigieg 'doesn't have significant black support even in his own city' Warren says she made almost M from legal work over past three decades Biden rallies with John Kerry in early primary states MORE all trail Trump in Wisconsin, according to the new Marquette Law School poll. Last month, all of these candidates except Buttigieg beat Trump.

Trump topped Biden, 47 percent to 44 percent, in the new poll.

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Trump also holds a 3-point edge over Sanders in Wisconsin, 48 percent to 45 percent. 

Trump's lead is wider against Warren, at 48 percent to 43 percent, and Buttigieg, at 47 percent to 39 percent, pollsters found. 

The results come as the House impeachment inquiry against Trump unfolds. Democrats launched the inquiry in September after a whistleblower reported Trump asked the Ukrainian president to look into Biden and his son. 

Trump won Wisconsin, along with Michigan and Pennsylvania, in the 2016 election, allowing him take the White House.   The Democratic Party is aiming to win these battleground states back in 2020. 

The new poll surveyed 801 registered voters in Wisconsin Nov. 13-17 and had a margin of error of 4.1 percentage points.