Donald Trump's Security Adviser, Michael Flynn Resigns Over Russia Controversy

National Security Adviser, Michael Flynn, resigned Monday night after it was revealed Flynn misled White House officials about conversations he had with the Russian ambassador to the United States.

In his resignation letter, Flynn said he's had numerous calls with the Russian Ambassador and "inadvertently briefed the Vice President Elect and others with incomplete information" regarding those calls. He said he apologized to President Trump and Vice President Mike Pence and they accepted his apology.

The Associated Press reports Trump privately told those close to him he was troubled by the situation, while his aides publicly said Trump had confidence in Flynn, according to a source.

Lt. Gen. Joseph K. Kellogg Jr. has been named acting national security adviser.