Canadian Prime Minister Justin Trudeau’s shredding of President Donald Trump’s newly-imposed tariffs on imports from Canada stunned “The Daily Show” host Michael Kosta on Tuesday.

Trudeau in a press conference called Trump by his first name and directly told the president: “Even though you a very smart guy, this is a very dumb thing to do.”

“Wow, wow. Yeah. Yeah. Yeah,” said Kosta.

The audience lapped up Trudeau’s diss of America’s political leader.

“He’s mad,” Kosta said of Trudeau. “And he’s not even world leader mad. He’s dad mad. This is the same tone I use when tell my daughter not to throw her baby sister into the crib. ‘You are not that type of person that does this even though you just did this and you’ll probably keep doing it.’”

Watch Kosta’s full monologue here: