Donald Trump’s new running mate keeps making headlines for all the wrong reasons. RadarOnline.com can reveal freshman Ohio Senator and controversial Hillbilly Elegy author J.D. Vance, 39, has gone viral again for his sexist mockery of ‘childless cat ladies’ like Kamala Harris, 59. In a resurfaced clip from 2021, Vance – whom Trump tapped as his VP pick last week – told former Fox News host Tucker Carlson: “We are effectively run in this country, via the Democrats, via our corporate oligarchs, by a bunch of childless cat ladies who are miserable at their own lives and the choices that they’ve m…