Meanwhile, U.S. Sen. Bob Corker, R-Tenn., chairman of the Senate Foreign Relations Committee, said in a statement he is "glad former Director Comey appeared before the Senate Intelligence Committee today and appreciate his cooperation as my colleagues on the committee continue their investigation".
His daughter, Sarah Huckabee Sanders, who serves as deputy press secretary for the White House, was a champion for Trump's honesty while Comey blasted him for his lies.
Comey also testified regarding his concerns his one-on-one conversations with Trump, which he said he felt the need to report in memos.
Kasowitz highlighted Comey's most favorable point for the president: that Trump was not personally the target of an FBI investigation.
US President Donald Trump's personal lawyer Mark Kasowitz says James Comey's testimony proved the president was not under any investigation and there is no evidence a single vote was changed as a result of Russian interference in last year's election.
Easing months of speculation Comey did confirm that Trump was not personally the subject of a counterterror or criminal probe when he left the Federal Bureau of Investigation last month.
A private lawyer for Donald Trump denied Comey's bombshell allegations, and suggested the ousted lawman should be prosecuted for leaking "privileged information".
While Comey confirmed to the Senate Intelligence Committee that Trump requested he drop a probe into former national security adviser Michael Flynn and that he "lift the cloud" of the Russian Federation investigation hanging over the young Republican administration, Ryan worked to explain away the President's actions and alleged misconduct.
US President Donald Trump is yet to publicly respond to James Comey's testimony, leaving it up to his lawyer and sons. Comey described discomfort about their oneon- one conversations, saying he decided he immediately needed to document the discussions in memos. After he was sacked, Comey asked a friend to leak the contents of a memo about an Oval Office meeting that he had with Trump to a newspaper reporter.
"We will leave it [to] the authorities to determine whether these leaks should be investigated along with all those others being investigated", the counselor said.
Mr Comey made his comments as the packed hearing got underway, bringing Washington and parts of the country to a halt as all eyes were glued on the hearing room.
During his five-minute round of questions, Rubio also pressed Comey to clarify that he perceived Trump's "let this go" request as being limited to Flynn rather than the broader investigation of Russian influence. It's not good stuff to have said on national television. In your estimation, was General Flynn at that time in serious legal jeopardy and, in addition to that, do you sense that the president was trying to obstruct justice or just seek for a way for Mike Flynn to save face given he had already been fired? "It's good to hear the facts". The president feels completely and totally vindicated.
Given that the former director's testimony is going cast a shadow over the Trump presidency for months, if not years, the White House counterattack is nearly certainly only just beginning.