Sen. Mark Warner Mark Robert WarnerDemocrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits Intelligence chief says Congress will get some in-person election security briefings MORE (Va.), the top Democrat on the Senate Intelligence Committee, said on Sunday that Congress’s failure to improve election security ahead of 2020 is the “height of irresponsibility.”

“America was attacked by a foreign power and chances are they and others will be back,” Warner said on CBS’s “Face The Nation." “It is the height of irresponsibility that Congress has not acted.”

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Warner said Congress should back bipartisan election security legislation that ensures measures such as a paper ballot trail and add further “guardrails” to social media against election interference.

He also said that while 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 determined the contacts between the Trump campaign and Russian agents did not rise to the level of conspiracy, there should be more clear-cut definitions and standards set.

Warner said the Senate Intelligence Committee wants to see the counterintelligence evidence Mueller received as part of his investigation "to finish our job."

Warner also addressed the current Justice Department investigation into the origins of the Russia probe, saying “if the intelligence community had not acted” on available information, “it would have been irresponsible.”

Attorney General William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE, he added, “has very little credibility,” calling Barr a “personal advocate for President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE.”

Warner said he had seen “no evidence politics played any role” in the genesis of the investigation.

“Facts will confirm what law enforcement and the intelligence community did was right,” he added.