Previous reports indicate that former National Security Adviser Michael Flynn and Paul Manafort, Trump's former campaign manager, are included in the investigation.
Deputy Attorney General Rod Rosenstein was returning to the Capitol on Friday for another closed-door session, this time with all members of the House. But he added: "I haven't lost my confidence in the president to be our president, I just haven't".
"I thought the July 5 press conference was profoundly wrong and unfair both to the Department of Justice and Secretary Clinton", said Rosenstein, adding, "It violated deeply ingrained rules and traditions, and it guaranteed that some people would accuse the Federal Bureau of Investigation of interfering in the election".
That explanation lasted until the next day, when Donald Trump agreed to give an interview and immediately firebombed his own PR team by admitting that he had made a decision to fire Comey before ever bringing Rosenstein and AG Jefferson Sessions to the White House.
He'd previously said he might announce his nominee before he left.
The Times report added to the impression given by Trump himself in a television interview last week in which he said the Russian Federation issue was a factor in firing Comey.More news: China building biggest infrastructure project in history
Deputy Attorney General Rod Rosenstein, speaking before lawmakers Friday, defended his controversial memo criticizing former FBI Director James Comey - a document the White House initially used to justify the firing of Comey. However, that is not what Trump actually said, according to the remarks as reported by the Times.
The topics, including the Justice Department's decision to appoint Former FBI Director Robert Mueller as Special Counsel to investigate Russian meddling in the 2016 election, overshadowed President Trump's third visit of the week from a foreign leader.
Former FBI Director Robert Mueller was named Special Counsel for the Russian Federation investigation on Wednesday.
While not confirmed by the White House, this plan of action would be a major attempt to weaken the investigation into the Trump campaign's possible ties with foreign actors.
'It is a candid memorandum about the FBI Director's public statements concerning a high-profile criminal investigation, ' Rosenstein said, according to a copy of his opening statement, The Hill reported.
The hearing will be scheduled after the May 29 Memorial Day holiday, the committee said in a statement.More news: Syrian Army confirms United States strike on military convoy
The developments were a blow to White House efforts to tamp down interest in the Russian Federation investigation as Mr Trump and his staff boarded Air Force One for Saudi Arabia - the first stop on his first foreign trip as President.
The appointment has drawn generally favourable comments from Democrats and from some Republicans as well. He says he hopes Comey's testimony will answer some of the questions that have arisen since Comey was suddenly dismissed last week by President Donald Trump.
She said subjects of the investigation could later argue that its results cannot be trusted, but she believes the argument would not stand up in court.
Trump has reacted furiously to the appointment of a special counsel, a prosecutor with wide authority to investigate Russia's interference and other potential crimes uncovered.
"My memorandum is not a legal brief; these are not issues of law", said Rosenstein, a longtime federal prosecutor. Current administration officials who have acknowledged contacts with Russian officials include Trump son-in-law Jared Kushner, as well as Cabinet members Attorney General Jeff Sessions and Secretary of State Rex Tillerson.More news: Rod Rosenstein: Jeff Sessions, Donald Trump wanted James Comey gone
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