Former Vice President Joe Biden continues to be the first choice of Democratic primary voters in Wisconsin, according to Wednesday's Marquette University Law School Poll.

Biden had 23% support, U.S. Sen. Bernie Sanders of Vermont had 19% support, former South Bend Indiana Mayor Pete Buttigieg had 15% and U.S. Sen. Elizabeth Warren of Massachusetts had the backing of 14%.

Former New York Mayor Michael Bloomberg and businessman Andrew Yang each had 6% support and U.S. Sen. Amy Klobuchar had 4% support.

Asked to rate their second choice, voters backed Warren with 21%, Biden and Sanders each with 18%, Bloomberg with 7%, and Buttigieg and Klobuchar of Minnesota with 6%