The White House ripped House Republicans on Tuesday for implementing new budget rules that look more favorably on tax cuts.
"As a result, it could allow Congress to adopt legislation that increases federal deficits, while masking its costs," Donovan added.
The House voted Tuesday to require large pieces of fiscal legislation to receive a dynamic score – meaning Congress's budget scorekeepers would seek to project whether those measures would spur economic growth, thus bringing in more revenue for the Treasury Department.
In his post, Donovan added that there's no consensus among economists about how accurate dynamic scoring is, and insisted the new method would unfairly force the Congressional Budget Office and the Joint Committee on Taxation to make broad assumptions about the economy when scoring legislation.
That's why, Donovan said, CBO and JCT should continue to provide dynamic scores as supplementary materials for lawmakers considering legislation.
"While all budget estimates are uncertain, there is substantially more disagreement among economists and experts about how policy changes affect the macroeconomy than about most other scoring issues," Donovan wrote.
Republicans are putting dynamic scoring into place at a time when House Ways and Means Chairman Paul RyanPaul RyanShutdown fears spur horse-trading GOP, Trump administration huddle on tax reform Overnight Healthcare: Dems eye deal on ObamaCare subsidies for extra military funding MORE (R-Wis.) and Senate Finance Chairman Orrin HatchOrrin HatchCongress nears deal on help for miners GOP, Trump administration huddle on tax reform Overnight Finance: Dems want ObamaCare subsidies for extra military spending | Trade battle: Woe, Canada? | Congress nears deal to help miners | WH preps to release tax plan MORE (R-Utah) have called revamping the tax code a top priority. House Republicans said during Tuesday's debate that there's no certainty in any economic projection, and that dynamic scores will allow lawmakers to make more informed decisions about legislation.