After a thumping in Wisconsin, Hillary Clinton is embracing a new tactic to undermine the rise of Bernie Sanders: suggesting he is not a Democrat.

Here’s Clinton: “He’s a relatively new Democrat…I’m not even sure he is one. He’s running as one. So I don’t know quite how to characterize him. I’ll leave that to him.” The quote comes from an interview Clinton did on a podcast hosted by an (unusually) fedora-less Glenn Thrush from POLITICO.