Republican deficit hawks held up a motion on the Senate tax plan for close to an hour before voting against sending the bill back to the Finance Committee.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (Ky.) and other GOP leaders huddled around Sens. Jeff Flake (Ariz.), Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (Tenn.) and Ron Johnson Ronald (Ron) Harold JohnsonThis week: Supreme Court fight over Ginsburg's seat upends Congress's agenda GOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate MORE (Wis.) on the Senate floor as Republicans discussed the tax bill.

At one point, almost 20 senators were huddled around the Senate parliamentarian as she appeared to be explaining a document in her hand.

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After the vote was open for about an hour, Flake, Corker and Johnson voted against sending the bill back to committee.