Flynn’s resignation came after it was reported that the Justice Department warned the White House weeks ago that Flynn could be vulnerable to blackmail for contacts with Russian officials before Trump took power on Jan. 20.
A US official confirmed a Washington Post report that Sally Yates, the then-acting US attorney general, told the White House late last month that she believed Flynn had misled them about the nature of his communications with the Russian ambassador to the United States.
She said Flynn might have put himself into a compromising position, possibly leaving himself vulnerable to blackmail, the official said. Yates was later fired for opposing Trump’s temporary entry ban for people from seven mostly Muslim nations.
Flynn, a retired US Army lieutenant general, was an early supporter of Trump and shares his interest in shaking up the establishment in Washington. He has frequently raised eyebrows among Washington’s foreign policy establishment for trying to persuade Trump to warm up US relations with Russia.