Trump, who has repeatedly made his vast monetary success a major selling point of his 2016 presidential run, filed campaign documents that his net worth is more than $10 billion.
Trump has frequently accused Walker of presiding over a $2.2bn deficit in Wisconsin, where the state legislature passed a two-year balanced budget last month.
Walker was on the campaign trail emphasizing his record of taking on the unions and the Democrats in Wisconsin, and even the Republicans. Carly Fiorina and Marco Rubio receive 7 percent each. Bernie Sanders of Vermont surging to 32 percent. Trump was not included in the April...