The former National Economic Council director under Presidents Bill Clinton William (Bill) Jefferson ClintonDolly Parton remembers Ginsburg: 'Her voice was soft but her message rang loud' Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Calls grow for Biden to expand election map in final sprint MORE and Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE slammed the Trump administration’s recent attacks on the accuracy of Congressional Budget Office (CBO) reports on the Senate healthcare bill.

“Fine for National Economic Council (NEC) to explain substantive disagreements with CBO. But for NEC to label CBO "fake news" is a disgrace,” Gene Sperling tweeted on Sunday.

Fine for National Economic Council (NEC) to explain substantive disagreements with CBO. But for NEC to label CBO "fake news" is a disgrace. https://t.co/Eypm9chCkM — Gene Sperling (@genebsperling) July 15, 2017

Sperling was responding to a Washington Post op-ed penned by White House legislative affairs director Marc Short and Brian Blase, a special assistant to President Trump for healthcare policy at the National Economic Council.

The piece tells Americans “to give little weight” to the CBO score of the ObamaCare repeal-and-replace bill.

Blase and Short said the CBO’s estimate of the Affordable Care Act was not accurate.

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“Although the CBO generally plays a valuable role in the legislative process, as Obamacare’s ongoing failure clearly demonstrates, the CBO’s health-care model is fundamentally flawed,” they wrote.

“The CBO’s failure to update the model means its forthcoming analysis of the Senate bill will be no better — and perhaps worse — than its disproven Obamacare projections. Although the media and the political left will certainly seize on it, the CBO’s estimates will be little more than fake news,” they continued.

The nonpartisan office predicted Senate Republicans’ original healthcare bill would leave 22 million fewer people without health insurance over the next 10 years than under ObamaCare.

Sperling’s tweet comes as multiple reports surface saying the CBO will not release a score Monday on the latest revision of the GOP healthcare legislation. Consideration of the bill will be put on hold this week while Sen. John McCain John Sidney McCainMomentum growing among Republicans for Supreme Court vote before Election Day McConnell urges GOP senators to 'keep your powder dry' on Supreme Court vacancy McSally says current Senate should vote on Trump nominee MORE (R-Ariz.) recovers in his home state from surgery.

The White House and Senate Republican leadership are struggling to push the bill over the finish line, and they can't afford to lose another vote from the GOP conference, according to the latest tally from The Hill’s Whip List.

All Democrats are expected to vote against the legislation, and Vice President Pence could be called in to cast a tie-breaking vote.