Republican vice presidential candidate Sen. J.D. Vance of Ohio quipped Tuesday that his counterpart, Minnesota Gov. Tim Walz, is finally getting combat zone experience with the Democratic National Convention being held in Chicago. Asked by a reporter at a campaign event in neighboring Kenosha, Wisconsin, about the opening night of the convention, Vance responded, “I will say just the contrast between the public safety policies of Kamala Harris and Donald Trump is really striking.” “It’s almost a joke to me that they held it in Chicago, which has become the murder capital of the United States o…