Senators are now voting on whether to begin debate on a bill that would form a commission to study the January 6th Capitol attack.
Before the vote, Senate Majority Leader Chuck Schumer made a final plea to Republicans to vote in favor of it.
The New York Democrat said the commission is "desperately needed" because former President Trump's "big lie" has eroded our democracy.
Schumer said there has been significant Republican input to establish rules for the panel, calling it "right down the middle."
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