Harvard Law professor Roberto Unger, whose pupils included one Barack Obama, has had enough of the president.

“President Obama must be defeated in the coming election,” Unger says in a web video. “He has failed to advance the progressive cause in the United States.”

Still, don’t expect to see Unger singing “Kumbaya” with Mitt Romney anytime soon: in the video, Unger is clear he thinks Republicans are even worse, saying “there will be a cost for [Obama’s] defeat in judicial and administrative appointments.”