National security adviser John Bolton has become the latest staffer set to leave the White House. Here's a timeline of other notable exits from the Trump administration.
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President Donald Trump on Wednesday asked Attorney General Jeff Sessions to resign, effectively firing him.
The president tweeted Twitter that a new secretary of defense will be named soon. Defense Secretary Jim Mattis will retire at the end of February.
Acting Secretary of Defense Patrick Shanahan is withdrawing his nomination for the position, which has not been filled permanently since Gen. James Mattis retired in January.