That didn’t sit well with Jones, a longtime anti-vaxxer and conspiracy theorist, who played a clip of Trump touting the vaccine at the rally. “But it is working,” said Trump.

“BS,” said Jones. “Trump, that’s a lie. You’re not stupid.” The InfoWars host then rattled off dubious statistics in order to cast doubt as to the effectiveness of vaccines.

“Shame on you, Trump,” Jones continued. “Seriously. Hey, if you don’t have the good sense to save yourself and your political career, that’s ok. At least you’re gonna get some good Republicans elected and you know, we like ya. But my god. Maybe you’re not that bright. Maybe Trump’s actually a dumbass.”