President Donald Trump has fired national security adviser John Bolton.

Trump tweeted Tuesday that he told Bolton Monday night that his services were no longer needed at the White House. He says Bolton submitted his resignation on Tuesday morning.

Trump tweeted that he “disagreed strongly” with many of Bolton’s suggestions, “as did others in the administration.”

In the meantime, John Bolton has tweeted that he actually offered to resign last night, but Trump said they would discuss it today.