A Democratic lawmaker on Saturday got a massive applause at a Vice President Kamala Harris rally after a jab at Donald Trump’s vice presidential pick, J.D. Vance. Rep. Dina Titus (D-NV), on stage before Harris at the campaign rally in Las Vegas, drew attention to Vance’s past claims about “childless cat ladies” who he said headed the Democratic party. “We’re 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 made,” Vance said. “And so they wanna make the rest of th…