Horn, who left the Lincoln Project last week amid the John Weaver scandal, has had a public spat with the anti-Trump group ever since her departure. But the Lincoln Project escalated tensions on Thursday night with tweets that appeared to be an exchange she had with 19th News correspondent Amanda Becker.

“Earlier this evening, we became aware that @AmandaBecker of @19thnews was preparing to publish a smear job on the Lincoln Project with the help of @NHJennifer,” the Lincoln Project began a lengthy thread. “You hear a lot of talk about hit-jobs in journalism, but rarely do you get to see their origin story. Enjoy.”

The tweets drew immediate condemnation, including by one of its co-founders, conservative attorney George Conway.

“This looks on its face to be a violation of federal law and should be taken down immediately,” Conway warned.