For all his success, J.D. Vance’s vice presidential debate performance suffered from one weakness: his abortion position. Vance, who had long been an outspoken defender of children conceived in “the difficult cases” of rape and incest, began modifying his position as Donald Trump began considering him as his running mate — and his over-modulated response attracted heavy criticism. Live Action founder Lila Rose found Vance’s abortion answer “sad and disappointing,” because it “furthered the false narrative that killing a baby...