Carson passes Trump in Wisconsin, Rubio close behind

Donald Trump leads among Republican voters in most places, but not Wisconsin.

According to a new poll by Wisconsin Public Radio, Dr. Ben Carson is leading in the Badger State with 20 percent support, with Trump and Sen. Marco Rubio tied for second at 18 percent.

Carson, the former neurosurgeon, polls the best when pitted one-on-one against former Secretary of State Hillary Clinton and Sen. Bernie Sanders, who are the front-runners for the Democratic nomination.

In a head-to-head matchup, Clinton tops Carson by only four points, 49-45. She trounces Trump and Jeb Bush in the state, topping them 50-39 and 49-39, respectively. Carson also falls to Sanders, who holds a six point lead, while Trump and Bush both fall by 18 and 14 point margins.

Following up the trio atop the GOP field are Sen. Ted Cruz with 10 percent support, and Carly Fiorina, who draws 8 percent backing.