President Donald Trump on Thursday called impeachment a “dirty, filthy, disgusting word” — which surprised many, who pointed out that it’s in the U.S. Constitution.

The comment raised the possibility that Trump isn’t aware that the Constitution employs the word to address Congress’ authority to deal with misconduct by a president. He told reporters they should read a “thing called Article II” of the Constitution (which addresses impeachment). But Trump insisted it “gives the president powers that you wouldn’t believe.”

Trump also said he couldn’t “imagine the courts allowing” impeachment. But Article II of the Constitution states that the House — not courts — “shall have the sole Power of Impeachment,” and the Senate “sole Power to try all Impeachments.”