Chris Christie is making a desperate push for the racist vote in Iowa to keep his candidacy alive.

According to Time political reporter Zeke Miller, Christie said during a speech to Republicans in the Hawkeye State Saturday that “many” in the movement “advocate for the murder of police officers.”

Fellow Republican presidential candidates Marco Rubio, Carly Fiorina, and Rick Santorum also paid a visit to Iowa this weekend, where the New Jersey governor doubled down on comments he’d made during CBS’s “Face the Nation” the week before. President Obama, Christie argued on the Sunday show, “doesn’t back up the police. He justifies Black Lives Matter.”

“I don’t believe that that movement should be justified when they’re calling for the murder of police officers,” he told host John Dickerson. When Dickerson pushed back, telling the presidential hopeful that the activists are “not calling for the murder of police officers,” Christie stood his ground.

“Sure they are,” he said. “Sure they are. They have been chanting in the streets for the murder of police officers.”