One of President Trump's oldest and closest friends is on the outs with the commander-in-chief, Politico reports.

Tom Barrack, a wealthy investor, has been by the president's side since the late 1980s, and that remained the case early on in Trump's tenure in the Oval Office when Barrack served as the chair of Trump's 2017 inauguration fund.

Now, though, the two reportedly no longer speak, current and former White House officials say. The falling out reportedly has something to do with Barrack's role in the inauguration, which is under investigation by prosecutors. The U.S. attorney's office in Brooklyn is investigating whether Barrack violated laws requiring lobbyists to register when they work for foreign interests. The prosecutors have placed a particular emphasis on whether the inauguration let foreigners from the Middle East use straw donors to donate to the inauguration.

"The last thing Trump needs is to be closely associated with one more person facing scrutiny and potential ethical issues," said a person who knows Barrack.

However, other sources told Politico that the fracturing of their friendship began before the inauguration fund and is actually a result of something much simpler. A former White House official said that Barrack "is the kind of guy who would tell" Trump "things he didn't want to hear, so Trump stopped talking to him." Another source close to Trump said the president just "got tired" of Barrack, who he felt was trying to involve himself too much in the administration.

Meanwhile, a spokesman for Barrack said that the relationship between the two "remains unchanged." But whatever the case may be, Politico notes the old pals could rekindle their friendship at any moment, as the president as been known to "turn on friends and allies, only to bring them back into the fold months or years later." Read more at Politico. Tim O'Donnell