Rep. Adam Schiff Adam Bennett SchiffOvernight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings MORE (D-Calif.) on Sunday said House Intelligence Committee Chairman Devin Nunes (R-Calif.) needs to decide if he wants to conduct a credible investigation into the Russian meddling in the presidential election.

"We can't have a credible investigation if one of the members, indeed the chairman, takes all the information he has seen to the White House and doesn't share it with his own committee," Schiff, the ranking Democrat on the panel, said on CBS's "Face The Nation."

Schiff was further pressed on whether he believes the chairman of the committee is a "tool of the White House he's investigating."

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"I think the chairman has to make a decision whether to act as a surrogate of the White House — as he did during the campaign and the transition — or to lead an independent and credible investigation," he said.

"I hope he chooses the latter. The country really needs to have an independent and credible investigation in the House ... I'm going to do everything I can to get this back on track."

Nunes last week bypassed his own committee to brief the president on information related to U.S. surveillance of his transition team.

Last Wednesday, Nunes said he had learned from a source that the U.S. intelligence community incidentally collected information on members of Trump's transition team and then "widely disseminated" the information internally. The news blindsided Democrats on the committee, as well as many Republicans.

Schiff said on Sunday that Nunes hasn't shared that information with him.

"I don't think he's shared it with anyone on the committee, and so we're all quite in the dark on this," he said.

"We I think suffered really two serious blows to the integrity of the investigation this week: one with that unilateral trip to the White House but the other with the cancellation of an open hearing that was scheduled for Tuesday."