Donald Trump is bad at spelling, and Jimmy Kimmel isn’t cutting him any slack.

During his monologue on Wednesday’s “Jimmy Kimmel Live!”, the host tore into Trump over a tweet about special counsel Robert Mueller’s investigation in which he originally misspelled “whether” as “wether” and initially wrote “council.”

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Trump later deleted the tweet and replaced it with another in which “counsel” was still misspelled.

“People have been saying, ‘I don’t know if he’s crazy or just dumb’ — dumb just won another round,” Kimmel joked.

“I know a lot of people can’t spell, but a lot of people aren’t president,” Kimmel added. “If only there was a program on our phones that told us when we misspelled something.”

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Kimmel also wondered whether the president’s typos could potentially get the U.S. into a war, and later played hilariously altered clips of previous presidents getting words wrong.