Don Lemon and Bill O’Reilly have been feuding with each other on-air, going from coverage about allegations against former national security advisor Susan Rice to allegations about O’Reilly himself.

The feud started on Monday when Lemon said that he would not “aid and abet” Donald Trump in his claims that he had been spied on by the Obama administration and also defended Rice against claims that she had asked for the names of Trump campaign members who had contact with Russia for political reasons.

O’Reilly then took to Twitter and his website saying that Lemon “refuses to cover” the Rice allegations and that Lemon had “declared his show a Rice-Free Zone.”

“False. I did not refuse to cover the story,” Lemon tweeted in response. “But I did cover your sexual harassment allegations. Did you?”

Then, on Tuesday night, Lemon specifically addressed O’Reilly’s claims.

“Normally I wouldn’t address this, but he has a lot of followers and people are believing alternative facts now,” Lemon said before playing several clips of panelists discussing the Rice story.

“So, Bill, we have covered the Susan E. Rice story, we did it for a long time on this program last night, and tonight we’re going to cover it again,” he concluded.