CNN’s Jake Tapper and former Fox News host Bill O’Reilly traded blows on Twitter late Wednesday afternoon, after O’Reilly taunted Tapper’s ratings for being “as low as you can go.”

Minutes after O’Reilly’s tweet, Tapper fired back at O’Reilly.

“ ‘Low’ would be sexually harassing staffers and then getting fired for it — humiliated in front of the world,” he wrote.

Tapper was referring, of course, to O’Reilly’s swift downfall in April after revelations of a series of sexual harassment complaints against him surfaced just weeks prior.

The conservative-leaning and combative former longtime host of Fox News’s top-rated show, “The O’Reilly Factor,” was accused by numerous women of sexual harassment. His departure came less than a year after the resignation of Roger Ailes, the co-founder and then-chairman of Fox, amid allegations of sexual harassment.

Bill O'Reilly let go from Fox News Channel (Peter Stevenson/The Washington Post)

O’Reilly appeared on Fox News last month for an interview with Sean Hannity, marking his first appearance on the network since his ouster. Last week, Tapper accused Hannity of hypocrisy, noting that while the Fox host made a cogent point about the “selective moral outrage” of the left in light of the scandal surrounding Hollywood mogul and Democratic donor Harvey Weinstein, he hosted Bill O’Reilly on his show despite the sexual harassment allegations against him.

This is not the first time that the two have feuded. In April, Tapper, who hosts “The Lead with Jake Tapper,” briefly reported on a new episode of O’Reilly’s “No Spin News” podcast, which marked O’Reilly’s first public on-air appearance since his departure from Fox. Tapper played part of O’Reilly’s podcast, in which the former Fox host appears to suggest that he will be vindicated when the “truth . . . come[s] out.” Tapper then made a quick aside, saying, “Oh, how the sleazy have fallen.”

In the months since leaving Fox, O’Reilly has been appearing weekly on Glenn Beck’s radio show. And in September, he released his newest book, “Killing England,” which this month climbed to the top of the New York Times’s bestsellers list.

Tapper and Hannity, too, have a history of previous feuds. In July, Hannity sent out an open call for people to bash Tapper, urging his viewers to “tell Fake News Jake Tapper exactly what you think” of him. Most people did the opposite.

Read more: