Joe Manchin said he can’t endorse Kamala Harris. His reason is terrible. Manchin said on Tuesday that he had decided against an endorsement because of her call to end the filibuster.

During an interview with Wisconsin Public Radio on Tuesday, Vice President Kamala Harris expressed her support for eliminating the filibuster—the Senate maneuver that effectively makes 60 votes the threshold for passing legislation, rather than a simple majority—when it comes to abortion rights.