Last night Bill Maher reiterated his longstanding frustration with Democrats who seem constitutionally incapable of talking tough and blunt about Donald Trump, and about the fact that the guys who are really letting him have it are fellow Republicans. Agreed — with the exception of Elizabeth Warren, Kamala Harris and a few others, Democrats are mostly acting like cowards. Yes, I know — they’re waiting for the blue mandate that will presumably come in November. But the fact that there’s still no galvanizing Democratic frontrunner for the Democratic presidential nomination is troublesome.