Liberty University President Jerry Falwell Jr. got involved in an ugly exchange on Twitter with Representative Alexandria Ocasio-Cortez after a dust-up over controversial comments he made in 2015.

It all started when Rep. Ocasio-Cortez retweeted a video of Falwell telling students “If more good people had concealed carry permits, we could end those Muslims before they walk in and kill us.” The tweet mistakenly claimed that the comments were made at the recent CPAC conference, when in fact, they were made in 2015 following a mass shooting in San Bernardino, Calif.

The tweet AOC retweeted also said, “@JerryFalwellJr threatened to shoot @AOC if she tried to ‘take his cows’ during #CPAC.” In a video from CPAC, Falwell says “My boys always have guns in their hands. That’s not something you teach them. That’s something they’re born with … I’ve got a hundred cows, you just let Alexandria [Ocasio-Cortez] show up to my house and try to take my cows away.” 

Though AOC corrected the initial tweet, things quickly went downhill from there, with Falwell calling her a “dumb liar.”

Falwell denied he was threatening AOC, though the context of his comments was about carrying guns.

Falwell then decided to invite Rep. Ocasio-Cortez to speak at Liberty.