UPDATED: GOP senators back motion on tax bill after hold up

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 McConnellAddison (Mitch) Mitchell McConnellOn The Money: Trump asks court to block release of tax returns to Congress | Private sector adds 330K jobs in July, well short of expectations Senate panel advances first three spending bills McConnell lays out GOP demands for government-funding deal MORE (Ky.) and other GOP leaders huddled around Sens. Jeff Flake (Ariz.), Bob CorkerRobert (Bob) Phillips CorkerCheney set to be face of anti-Trump GOP How leaving Afghanistan cancels our post-9/11 use of force The unflappable Liz Cheney: Why Trump Republicans have struggled to crush her  MORE (Tenn.) and Ron JohnsonRonald (Ron) Harold JohnsonSenate rejects GOP effort to add Trump border wall to bipartisan infrastructure deal Johnson suggests FBI knew more about Jan. 6 planning than has been revealed: report The Hill's Morning Report - Presented by Facebook - White House, Dems play blame game over evictions 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. 
After the vote was open for about an hour, Flake, Corker and Johnson voted against sending the bill back to committee.
The unprecedented floor drama came after the Joint Committee on Taxation said Thursday that projected economic growth under the bill would reduce revenue losses by $408 billion over 10 years, but the bill overall would still cost about $1 trillion.
Senate Majority Whip John CornynJohn CornynWhite House trying to beat back bipartisan Cornyn infrastructure amendment Senate GOP shifts focus to fight over Biden's .5 trillion budget McConnell warns Schumer cutting off debate quickly could stall infrastructure deal MORE (R-Texas) said the discussions on the floor were focused on finding an alternative to the "trigger" concept backed by Corker, which would impose higher taxes if economic growth forecast under the bill fails to materialize, causing the deficit to skyrocket.
"It doesn't look like the trigger is going to work. ... So we have an alternative, frankly, tax increase we don't want to do," he said.