When Defense Secretary James Mattis tendered his resignation earlier this week he said he would stay on the job for a couple months to help transition someone new into the important position. But it looks Donald Trump doesn’t want him to stay another day. Today CBS News correspondent David Martin “has confirmed from a senior administration official that @RealDonaldTrump is expected to order Sec of Defense Mattis to leave the job immediately and will appoint Dep Sec Patrick Shanahan as Acting Sec of Defense @CBSNews.”

Trump is reportedly seething over the way Mattis’ resignation is being portrayed. Saturday Trump tweeted:

When President Obama ingloriously fired Jim Mattis, I gave him a second chance. Some thought I shouldn’t, I thought I should. Interesting relationship-but I also gave all of the resources that he never really had. Allies are very important-but not when they take advantage of U.S.

As for Mattis’ temporary replacement. The New York Times points out:

Mr. Shanahan, who, like Mr. Mattis, is from Washington State, is a former Boeing executive. Aides say that Mr. Trump likes him in part because he often tells the president that he is correct to complain about the expense of defense systems.