Michael Flynn, U.S. President Donald Trump's national security adviser, resigned on Monday night amid controversy about his contacts with Russian officials.
Flynn who served in the post for less than one month is under scrutiny amid reports he talked to the Russian ambassador to the U.S. about sanctions before Trump’s inauguration. According to U.S. laws, it is illegal for private citizens to conduct government diplomacy.
Flynn initially denied having discussed sanctions with the ambassador, with Vice President Mike Pence rejecting the allegations on his behalf.
However, he conceded the issue in his resignation letter, acknowledging he held numerous calls with the Russian ambassador to the U.S. during the transition.
“Unfortunately, because of the past pace of events, I inadvertently briefed the Vice-President Elect and others with incomplete information regarding my phone calls with the Russian Ambassador,” Flynn wrote in the letter. “I have sincerely apologized to the President and the Vice President, and they have accepted my apology.”
Retired General Keith Kellogg, who has been the chief of staff at the National Security Council, has been named acting national security adviser of the U.S.