The addition of the credits is a key concession to liberals and is seen as helping the measure's passage through the Senate. Democratic Sens. Sherrod BrownSherrod BrownThe Hill’s Whip List: Where Dems stand on Trump’s Supreme Court nominee Senators war over Wall Street during hearing for Trump's SEC pick Sanders to oppose Gorsuch's nomination MORE (Ohio) and Tom HarkinTom HarkinGrassley challenger no stranger to defying odds Clinton ally stands between Sanders and chairmanship dream Do candidates care about our health or just how much it costs? MORE (Iowa) are among those who could back the deal with the additional provisions.

White House press secretary Robert Gibbs described as "important" the ethanol tax credits and an extension of a cash grant program for renewable energy companies, which were added by Senate Majority Leader Harry ReidHarry ReidThis obscure Senate rule could let VP Mike Pence fully repeal ObamaCare once and for all Sharron Angle to challenge GOP rep in Nevada Fox's Watters asks Trump whom he would fire: Baldwin, Schumer or Zucker MORE (D-Nev.) to the tax-cut framework. 

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"Well, look, again, I — as you mentioned, $3 billion for a one-year extension of the energy production tax credits was added into the legislation last evening," he told reporters off-camera at the White House. "Obviously, it had been a priority of ours and a priority of Democrats on Capitol Hill."

A Senate GOP aide emphasized that the energy tax credits were discussed during negotiations with the White House.

Gibbs cautioned, however, that the White House does not want major, fundamental changes to the compromise plan. 

"I think the administration continues to believe that, and as you heard, I think, the president say on NPR that he was confident that the framework — the framework is going to look like the one we put forward in terms of what gets voted on," he said. "Again, as we've said earlier and even yesterday: If there are changes that can be made that everybody signs onto, that's great. But I think we have, certainly for the Senate vote, a framework of what's going to move forward."