Donald Trump is running the most racist presidential campaign in recent memory, which is the kind of thing that may work for you in a Republican primary, but eventually catches up with you in a general election. That catching-up process got into gear during Monday night's debate, thanks both to Trump’s flailing answers to moderator Lester Holt’s questions—and to Hillary Clinton bringing it. Trump again tried to claim that Clinton was the original birther and that he, Donald, had done President Obama a favor by successfully demanding his birth certificate.