Poll: Trump leads in Wisconsin
© Greg Nash

Donald TrumpDonald John TrumpPapadopoulos on AG's new powers: 'Trump is now on the offense' Pelosi uses Trump to her advantage Mike Pence delivers West Point commencement address MORE is the number one GOP presidential pick in a poll of Wisconsin Republican voters.

The real-estate mogul garners 20 percent support, according to a poll live-tweeted by the University of Marquette Law School on Wednesday.

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He’s followed by Ben CarsonBenjamin (Ben) Solomon CarsonTrump administration to make it easier for adoption agencies to reject same-sex couples: report READ: Ben Carson's letter clarifying testimony on protections for homeless transgender people Exclusive: Carson seeks to clean up testimony on protections for homeless transgender people MORE at 16 percent, Sen. Marco RubioMarco Antonio RubioFrustration boils over with Senate's 'legislative graveyard' Senate passes disaster aid bill after deal with Trump GOP senators work to get Trump on board with new disaster aid package MORE (R-Fl.) at 14 percent, Carly Fiorina at 11 percent, former Florida governor Jeb Bush at 7 percent and Sen. Ted CruzRafael (Ted) Edward CruzOn The Money: Conservative blocks disaster relief bill | Trade high on agenda as Trump heads to Japan | Boeing reportedly faces SEC probe over 737 Max | Study finds CEO pay rising twice as fast as worker pay Conservative blocks House passage of disaster relief bill The Hill's Morning Report — After contentious week, Trump heads for Japan MORE (R-Texas) at 5 percent.

Trump is up 11 points since the poll’s last iteration in August. Other big risers are Rubio, who is up 7 points, and Fiorina, who is up 4 points.

The poll attributes the businessman’s success to his favorability among former supporters of Wisconsin Gov. Scott Walker (R), who dropped out of the race last week.

Trump claims 22 percent of those who say they would have supported Walker’s presidential bid, the most among any candidate. Rubio garners 14 percent of ex-Walker backers, followed by Carson with 11 percent, and Cruz with 10 percent.

Twenty-eight percent of respondents say they would have supported Walker’s campaign had he stayed in the race.

Although Trump is the first choice among a plurality of Republican voters in the state, only 5 percent of respondents choose the real estate-mogul as their second option.

Rubio is the favorite runner-up, with 17 percent of voters choosing him second, followed by Fiorina with 15 percent and Carson with 12 percent.

The poll surveyed 321 Republicans in the state through landline and cell phone calls from Sept. 24 – 28. The margin of error is 6.5 percent.