WATCH: Warner blasts Trump, Gabbard involvement in FBI search on Fulton County election office

The top Democrat on the Senate Intelligence Committee said Tuesday that Director of National Intelligence Tulsi Gabbard's attendance at an FBI search of a Georgia election office is eroding longstanding barriers separating intelligence work from domestic law enforcement.

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Sen. Mark Warner of Virginia on Tuesday rejected Gabbard's argument that she participated in the search because President Donald Trump asked her to be there, saying she should be focused on international threats to the U.S. instead of amplifying Trump's disproven conspiracy theories about the 2020 election.

READ MORE: Attorney says Gabbard is holding up a complaint about her actions, which her office denies

"It raises serious legal and constitutional questions and politicizes an institution that must remain neutral," Warner said at a press conference at the Capitol, speaking of the nation's intelligence service. "She has no role in executing search warrants."

Gabbard defended her role at the search in a letter to lawmakers, arguing that she regularly works with the FBI and is authorized to investigate any threat to election security.

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