President Donald Trump's longtime personal aide was fired Monday.
John McEntee was reportedly escorted from the White House over problems with his security clearance.
A unnamed source told CNN McEntee was fired because the Department of Homeland Security is currently investigating him "for serious financial crimes." Those crimes are reportedly not Trump-related.
News of McEntee's ouster came shortly after Trump announced he was replacing Rex Tillerson as secretary of state.
McEntee had worked for Trump since the early days of his campaign.
White House Press Secretary Sarah Sanders wouldn't comment on McEntee's firing.
He's now joining Trump's 2020 campaign as a senior adviser.
