At the end of a four-hour-plus hearing on Russian election interference on Monday, the chairman of the House Intelligence Committee told FBI Director James Comey James Brien ComeyTrump jabs at FBI director over testimony on Russia, antifa Graham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' MORE that his testimony placed “a big, gray cloud” over the White House.

“There is a big, gray cloud that you’ve now put over people who have very important work to do to lead this country,” Rep. Devin Nunes Devin Gerald NunesSunday shows preview: With less than two months to go, race for the White House heats up Sunday shows preview: Republicans gear up for national convention, USPS debate continues in Washington Sunday shows preview: White House, congressional Democrats unable to breach stalemate over coronavirus relief MORE (R-Calif.) told Comey. “And so the faster you can get to the bottom of this, it’s going to be better for all Americans.”

Comey during his testimony confirmed that the FBI is investigating Moscow’s interference in the 2016 presidential election, including any possible coordination between members of President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE’s campaign and Russian officials.

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The FBI director’s confirmation of the probe breaks with the FBI’s policy not to disclose ongoing investigations.

“As you know, our practice is not to confirm the existence of an ongoing investigation,” Comey said at the beginning of the hearing. “But in unusual circumstances where it is in the public interest, it may be appropriate to do so.”

Nunes urged Comey to provide any evidence it finds to the committee and emphasized the need to get to the bottom of the probe quickly.

“And if you have evidence, especially as it relates to people in the White House, that are working in the White House or the administration, that would be something that we really should know about and we should know about quickly,” Nunes said.

The chairman expressed his frustration over Comey’s refusal to comment on whether or not Trump is under investigation to reporters on Capitol Hill following the testimony.

"This is why this investigation has to go quickly. I think this is very problematic moving forward — that you can't even say whether or not people in the White House or the administration are under some kind of investigation. I think that's very problematic,” he said.