Lifelong bachelor Sen. Lindsey Graham responded to Republican vice presidential nominee J.D. Vance’s rebuke of childless adults being unfit for leadership with a smirk during a CNN interview Tuesday. “I don’t know, maybe I proved his point,” Graham, of South Carolina, said with a smile. “The election won’t come down to what [Vance] said on a podcast. It will come back to whether or not we change course as a nation.” Graham pivoted to bashing Democratic presidential nominee Kamala Harris as a failed “border czar” — a notion extensively debunked by fact checkers. When the discussion turned back …