Right-wing lightning rod Ann Coulter surely is not endorsing Sen. Elizabeth Warren, but don’t tell that to supporters of the Massachusetts Democrat.

“ ‘Sen. Warren has convinced me that Bernie isn’t that worrisome. He’ll never get anything done. SHE’S the freak who will show up with 17 idiotic plans every day and keep everyone up until it gets done.’ ”

That is the tweet that sent Coulter flying up Twitter’s TWTR, +2.03% trending list in the wake of the latest Democratic presidential debate Tuesday night. Judging from the spirited response, her comment probably didn’t strike its intended note: