Sen. Mark Warner Mark Robert WarnerIntelligence chief says Congress will get some in-person election security briefings Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House approves bill to secure internet-connected federal devices against cyber threats MORE (D-Va.) said new documents have raised more questions in the Senate Intelligence Committee's investigation into Russia's election interference.

Warner, the top Democrat on the committee, told Politico that Congress late last year got "extraordinarily important new documents" regarding its Russia probe.

He said the "end-of-the-year document dumps" showed "very significant" revelations.

He added that they "opened a lot of new questions" regarding the Senate panel's investigation.

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“We’ve had new information that raises more questions,” Warner said during the interview for "The Global Politico."

Warner also said he thinks there is a "coordinated effort to try to impede the investigation."

There are currently multiple investigations into Russia's election interference and possible collusion between the Trump campaign and Moscow.

President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE has dismissed the Russia probe as a "witch hunt" and has denied collusion.

Warner also said during the interview that special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE is "getting closer and closer to the truth."

“Closer and closer to the truth is getting closer and closer to the president," he said.