Republican Senator Richard Burr, the committee chairman, and the assistant chairman, Democratic Senator Mark Warner, announced in a statement that they had sent a new letter to Comey, who had rejected their previous invitation because he wanted to testify in public, not exclusively in private.
Turley weighed in on the report that FBI Director James Comey wrote a memo in which he accused Trump of asking him to shut down the investigation into Michael Flynn.
At the end of the press conference, Ryan was asked if he still had full confidence in President Trump.
The House Intelligence Committee on Tuesday asked the Federal Bureau of Investigation for all documents prepared by Comey regarding his conversations with Trump.
Mr Flynn was Mr Trump's first national security adviser, but was sacked after misleading the government over his meetings with Mr Kislyak - he apparently offered to reduce sanctions on Russian Federation before he was appointed, but it is illegal for private citizens to conduct U.S. diplomacy.
Russian President Vladimir Putin said on Wednesday that Trump had not passed on any secrets to Lavrov.
The information had been supplied by a US ally in the fight against the Islamic State militant group, the officials said.More news: Severe Weather Outbreak Likely Thursday Night In The Central and Southern Plains
"I was in the Nixon administration as you know and I thought after watching the Clinton impeachment I thought I'd never see another one", David Gergen said on CNN Tuesday night.
Then a "current and a former official" - presumably the same ones who talked to the Post - revealed to the New York Times that Israel was the source of the information Trump spoke with Russian officials about. "And people who are going to promote the president's policies rather than undermine them - he needs to put those people in place", he added.
Comey's memo, an apparent effort to create a paper trail of his contacts with the White House, would be the clearest evidence to date that the president has tried to influence the investigation.
House of Representatives Speaker Paul Ryan insisted that Republicans, who control both chambers of Congress, were not seeing their legislative agenda mired, but the controversy enveloped Washington.
Following Comey's abrupt dismissal, Trump contradicted his communications staff on the reason for firing him and admitted it was partially because of how Comey was handling the Russian investigation, touching off obstruction of justices allegations.
The White House has played down the importance and secrecy of the information Trump gave to the Russians, which had been supplied by Israel under an intelligence-sharing agreement.
Republicans, caught off-guard, insisted they wanted to hear from Comey, who was sacked last week a day before Trump met in the Oval Office with the Russian diplomats.