Like almost everything about the Clintons, it started as a joke and somehow turned real. Hillary Rodham Clinton running for President wasn’t a bad gag: she’s widely believed to be consumed by ambition; her husband, her chosen vessel these last several decades, was a spent force, politically if not in the DNA fabric-analysis sense; and it was unlikely that she’d become Senator for New York in order to spend the next couple of decades attending to the complaints of whiny losers in upstate welfare backwaters. For many on the right, the faux warnings about a Rodhamite restoration in the White...