Officials escorted McEntee out of the White House on Tuesday and did not allow him to collect his belongings.
Now, with Mr. McEntee gone, the president will have none of his closest, most-trusted aides by his side at all times. ABC News has also previously reported that White House Chief of Staff John Kelly wanted to see a list of remaining White House staffers with security clearance issues.
Former UConn quarterback Johnny McEntee's time in the White House is over.
But inside the West Wing, McEntee was a common presence, serving as Trump's body man. He was known for being prepared to supply Trump with whatever he might need while aboard his campaign plane, on Air Force One and around the White House - a drink, his jacket, or hair spray.
"We do not comment on personnel issues", White House press secretary Sarah Sanders told CNN.
Neither the White House nor the Trump campaign have commented on the matter.
CNN cited a source as saying McEntee is the subject of a financial-crimes investigation by the Department of Homeland Security. "The White House's ongoing obstruction of congressional oversight appears to be an attempt to hide from the American people pervasive and widespread dysfunction inside the White House, which directly threatens our nation's security".
The 27-year-old former University of CT quarterback is more widely known for a viral YouTube trick throw video than his work with Trump.
At a Make America Great Again rally for Rick Saccone, the president vowed that he would 'Keep America Great!' if reelected. Ivanka Trump, his daughter, and her husband, Jared Kushner, have offices near Mr. Trump but play different roles.
McEntee is the latest original Trump campaign aide to depart the White House; he follows Communications Director Hope Hicks, who resigned recently.
His 2020 re-election campaign said Tuesday McEntee will serve as senior adviser to the campaign.