Leadership appeared confident on Friday morning that they had the votes to pass their tax plan.
"We have the votes," McConnell told reporters after a closed-door caucus meeting.
GOP Sens. Corker and Susan CollinsSusan Margaret CollinsMcConnell gets GOP wake-up call Republicans are today's Dixiecrats Biden's push for unity collides with entrenched partisanship MORE (Maine) have not said how they will vote on the tax legislation.
Flake said in addition to getting rid of an $85 billion "budget gimmick," he had also secured an agreement to work on a legislative fix for the Deferred Action for Childhood Arrivals (DACA) program.
"The second was to obtain a firm commitment from the Senate Leadership and the administration to work with me on a growth-oriented legislative solution to enact fair and permanent protections for DACA recipients," he said.
The Trump administration announced earlier this year that it would end the DACA program.
A group of Senate Republicans, led by Sen. Chuck GrassleyChuck GrassleyOn The Money — Progressives play hard ball on Biden budget plan Hillicon Valley — Presented by LookingGlass — Congress makes technology policy moves Senators preview bill to stop tech giants from prioritizing their own products MORE (R-Iowa), made an offer to Sen. Dick DurbinDick DurbinSenators preview bill to stop tech giants from prioritizing their own products Democrats struggle to gain steam on Biden spending plan Press: Where's Merrick Garland when we need him? MORE (D-Ill.) that would pair much of Sen. John CornynJohn CornynCornyn raises more than M for Senate GOP Is the Biden administration afraid of trade? The Hill's Morning Report - Presented by Facebook - After high drama, Senate lifts debt limit MORE's (R-Texas) border security bill with an immigration fix that did not include a path to citizenship.
Some House Democrats, and a growing number of Senate progressives, have pledged to oppose any government spending bill without a deal on DACA.