After boasting about his support among Christian conservatives at a Iowa rally on Wednesday, Donald Trump asked non-Christians to identify themselves.

The Republican nominee first asked the crowd in Council Bluffs to raise their hands if they were Christian conservatives. The crowd cheered loudly and a sea of hands went up.

“Raise your hand if you’re not a Christian conservative,” Trump then said. “I want to see this, right? Oh there’s a couple people, that’s all right.”

“I think we’ll keep them, right?” Trump asked the crowd. “Should we keep them in the room, yes? I think so.”

While the Republican nominee’s jocular tone suggested he wasn’t seriously suggesting throwing non-Christian attendees out of the event, he has made similarly off-color “jokes” before.

In July, Trump said he was “being sarcastic” when he invited Russia to hack into Hillary Clinton’s emails, and in August he again used “sarcasm” to explain his baseless claim that Clinton and President Barack Obama “founded ISIS.”

h/t Huffington Post

Correction: This post originally said that Trump made his comments at his Wednesday evening rally in Waukesha, Wisconsin. The remarks were actually made earlier Wednesday afternoon in Council Bluffs, Iowa.