National Security Agency (NSA) Director Mike Rogers is frustrated that he has not yet convincedPresident Trump thatU.S. intelligence indicatesRussia interferedin the 2016 presidential election, CNN reported Wednesday.

Rogers vented frustration over his fruitlessefforts to lawmakers during a recent closed-door briefing on Capitol Hill,a congressional source familiar with the meeting told the news network.

The intelligence community continues to brief the president on new informationon Russia's election involvementas itcomes to light.

An intelligence official told CNN that while Trump does not seem less engaged when being briefed on the matter, he has expressed frustration outside of the briefings that too much attention is being paid to the ongoing probe into Russia's interference in the election.

Russia, as well as other countries such as China, Iran and North Korea are consideredpotential threats by U.S. intelligence.

CNN reported that other top administration officials have also tried to emphasize the importance of a foreign nation attempting to meddle in the U.S. elections.

The president has taken to social mediato criticize formerPresident Barack ObamaBarack ObamaOvernight Energy: Trump vows to bring American energy dominance Fox News anchor rips RNC chair for defending Trump attack on Brzezinski CBO: Debt ceiling will be hit in October MORE after a bombshell report by The Washington Post revealed his predecessor was briefed about Russia's activities in August 2016 and was slow to respond.

"I just heard today for the first time that Obama knew about Russia a long time before the election, and he did nothing about it," Trump told Fox News in an interview that aired Sunday. "To me -- in other words -- the question is, if he had the information, why didn't he do something about it? He should have done something about it."

Trump has also repeatedly called the ongoing probe into Russia and possible ties between the Kremlin and hiscampaign a "witch hunt."

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NSA director frustrated Trump won't accept Russia interfered in election: report - The Hill