In a New York Times op-ed today, John Yoo wrote the following words: “even I have grave concerns about Mr. Trump’s uses of presidential power.”

That should get your attention, since Yoo, a fancy law professor at Berkeley, is best known for authoring much of the legal advice claiming the U.S. could legally engage in torture when he served in George W. Bush’s Justice Department.

In fact, Yoo believed this so fervently that in 2005 he said that a president can torture children if necessary, and there’s nothing that Congress or international law can do to stop him.

Yoo explained his perspective during a debate with Doug Cassel, then the director of Notre Dame Law School’s Center for Civil and Human Rights:

CASSEL: If the President deems that he’s got to torture somebody, including by crushing the testicles of the person’s child, there is no law that can stop him?

YOO: No treaty.

CASSEL: Also no law by Congress. That is what you wrote in the August 2002 memo.

YOO: I think it depends on why the President thinks he needs to do that.

You can listen to the audio of Yoo making that case here: