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Chris Christie is screwed.

On Friday, Bridget Anne Kelly, Christie’s former deputy chief of staff, testified that Christie knew and approved of a “traffic study” that would close access lanes to the George Washington Bridge at least a month before the lanes were closed. The lane closures were allegedly political payback against a Democratic rival.

This is very bad news for Christie, who has repeatedly denied knowing anything about the lane closures before they went into effect, despite the involvement of his top aides. Over the last several weeks of a federal trial investigating Bridgegate, however, the dots have been connected. Kelly’s testimony has made clear what was already widely assumed, that Christie was aware of, if not behind, this petty and illegal act of political retribution.

Christie still has one year left to serve as governor, but could very well be impeached before that. He’s already essentially a lame duck, and has spent much of the last six months campaigning on behalf of Donald Trump. Christie’s avid support for Trump has been mystifying to some, but it makes perfect sense: Both politicians never give an inch, Christie is enamored with the rich and famous, and, perhaps most importantly, President Trump represents the only possible salvation for Christie. Riding Trump’s coattails, as Mike Pence has proved, can be a good way to escape being an unpopular governor.

But it increasingly looks like Christie has no escape: Trump is going to lose and Bridgegate is slowly but surely undoing his career.