WASHINGTON — In a newly published interview with the New York Times, President Donald Trump claimed he forced former Defense Secretary Jim Mattis to resign because “I wasn’t happy with the job that he was doing at all” and needed to make a change.

“I told Mattis to give me a letter (of resignation),” Trump told the newspaper. “He didn’t just give me that letter … I said it’s time.”

The comments are the latest revision by the commander-in-chief concerning Mattis departure from the top Pentagon post.

When Mattis announced his departure in December, the White House initially called it a “retirement” and praised the outgoing Cabinet official for “tremendous progress” in strengthening the military. Within a few weeks, however, Trump said called Mattis’ performance in the job “not too good” and said his resignation was welcomed.

Now, Trump is suggesting that he fired the popular former Marine Corps general because of poor performance leading the military. In his resignation letter, Mattis wrote that he was stepping down “because you have the right to have a Secretary of Defense whose views are better aligned with yours.”

“In the letter he wrote, ‘You have to have your own choice,’” Trump said in the interview. “The reason he said that was because I said, ‘You’re just not my choice.’”

Trump did not elaborate on what changed between his effusive praise of Mattis early in his presidency and the months leading up to his departure. But he did note that “I got him more money than the military has ever seen before” and said he was still unhappy with the results.

In his resignation letter, Mattis took aim at Trump’s past criticism of foreign allies and his decision to withdraw U.S. troops from Syria in the months ahead. Mattis had planned a departure date of late February, but Trump announced just three days later that Deputy Defense Secretary Patrick Shanahan would assume the acting defense secretary role on Jan. 1.