President Donald Trump and congressional Republican leaders, frustrated they had to work with Democrats to pass a fiscal 2018 omnibus spending measure, are mulling a way for their party to effectively cut some of the funds they just approved.

The idea would be to deploy lesser-used provisions of the 1974 budget law to roll back spending by impounding some of the appropriated funds.

The Congressional Budget and Impoundment Control Act of 1974 — more frequently referred to as the Budget Act, the sections of the law that are more commonly used — provides an expedited process for the president to propose and Congress to review a rescission resolution identifying appropriations that the administration does not want to spend.

The president must submit a message to Congress specifying the amount of funds the administration wants to rescind and from which accounts and programs, along with estimated fiscal and program effects and the reasons for the rescission, according to the Congressional Research Service.

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