House Republicans had mixed reactions to the announcement. "But no president gets to jail journalists". He did not notify White House or Attorney General in advance, CNN reports.
"I hope you can see your way clear to letting this go, to letting Flynn go", the New York Times reported Trump said, citing the Comey memo.
Mr Trump responded by tweeting that as president, he has the authority to disclose whatever he likes.
The White House has played down the importance and secrecy of the information Mr Trump gave to the Russians, which had been supplied by Israel under an intelligence-sharing agreement.
Trump then punts to all the things he says are going well with jobs, manufacturing and in the fight against ISIS.
"We need to have immediate classified briefings on what occurred at this meeting so that Congress can at least know as much as Russian leaders", she said in a statement.
Republicans and Democrats alike were eager to hear from Mr Comey, who has increasingly emerged as a central figure in the unfolding drama. Mark Warner, D-Virginia, sent a letter Wednesday asking Comey to testify before the committee in both open and closed sessions.
During the event, he was asked to respond to the news that Deputy Attorney General Rod Rosenstein has appointed special counsel to lead the investigation into Russian Federation.
Cairo: "Giocatori già in vacanza"
La squadra non mi è piaciuta per niente. È dispiaciuto anche Mihajlovic perché evidentemente il Toro di ieri non è sceso in campo. Abbiamo tutta l'intenzione di tenerlo, è un giocatore importante per noi.
Most GOP lawmakers tried on Wednesday to tamp down the controversy and head off new investigations of Russian meddling in the United States election and potential ties to Trump's campaign.
Asked what he thinks of the Trump presidency, Mr Putin said it is up to the American people to judge and his performance can be rated "only when he's allowed to work at full capacity", implying that someone is hampering Mr Trump's efforts.
"There's no collusion. Russian Federation is fine", Trump says.
Striking a defiant stance, he added: "You can't let the critics and the naysayers get in the way of your dreams". Adversity makes you stronger.
President Donald Trump has welcomed the president of Colombia to the White House for their first official meeting.
The Flynn investigation was part of a broader probe into Russian interference in last year's presidential election. "This is not a truthful or accurate portrayal of the conversation between the president and Mr Comey".
Sen. Charles Grassley, the chairman of the committee, and Democratic Sen.
Representative Barbara Comstock of Virginia, whose district is home to large numbers of Federal Bureau of Investigation and CIA employees, said Trump's disclosure of classified intelligence to the Russians is "highly troubling".