“Upon careful consideration, I have terminated my relationship with the Lincoln Project, effective immediately,” Ms. Horn said in a statement to The New York Times.

“John Weaver’s grotesque and inappropriate behavior, coupled with his longstanding deceptions concerning that behavior, are sickening,” she said, adding, “It is clear at this point that my views about how the Lincoln Project’s efforts are managed, and the best way to move the Lincoln Project forward into the future in the wake of these awful events, have diverged.”

Ms. Horn did not further elaborate. In a response, the Lincoln Project said that 48 hours ago, Ms. Horn requested “an immediate ‘signing bonus’ payment of $250,000 and a $40,000-per-month consulting contract,” and claimed that in December, she had “demanded a board seat on the Lincoln Project, a television show, a podcast hosting assignment and a staff to manage these endeavors.”