““We can simply choke off the money,” Trump said in a 2023 campaign video. “For 200 years under our system of government, it was undisputed that the president had the constitutional power to stop unnecessary spending.”
His plan, known as “impoundment,” threatens to provoke a major clash over the limits of the president’s control over the budget. The Constitution gives Congress the sole authority to appropriate the federal budget, while the role of the executive branch is to dole out the money effectively. But Trump and his advisers are asserting that a president can unilaterally ignore Congress’ spending decisions and “impound” funds if he opposes them or deems them wasteful.
Trump’s designs on the budget are part of his administration’s larger plan to consolidate as much power in the executive branch as possible.”
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“The prospect of Trump seizing vast control over federal spending is not merely about reducing the size of the federal government, a long-standing conservative goal. It is also fueling new fears about his promises of vengeance.”
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“Trump and his aides claim there is a long presidential history of impoundment dating back to Thomas Jefferson.
Most historical examples involve the military and cases where Congress had explicitly given presidents permission to use discretion, said Zachary Price, a professor at the University of California College of the Law, San Francisco. Jefferson, for example, decided not to spend money Congress had appropriated for gun boats — a decision the law, which appropriated money for “a number not exceeding fifteen gun boats” using “a sum not exceeding fifty thousand dollars,” authorized him to make.
President Richard Nixon took impoundment to a new extreme, wielding the concept to gut billions of dollars from programs he simply opposed, such as highway improvements, water treatment, drug rehabilitation and disaster relief for farmers. He faced overwhelming pushback both from Congress and in the courts. More than a half dozen federal judges and the Supreme Court ultimately ruled that the appropriations bills at issue did not give Nixon the flexibility to cut individual programs.
Vought and his allies argue the limits Congress placed in 1974 are unconstitutional, saying a clause in the Constitution obligating the president to “faithfully execute” the law also implies his power to forbid its enforcement. (Trump is fond of describing Article II, where this clause lives, as giving him “the right to do whatever I want as president.”)
The Supreme Court has never directly weighed in on whether impoundment is constitutional. But it threw water on that reasoning in an 1838 case, Kendall v. U.S., about a federal debt payment.
“To contend that the obligation imposed on the President to see the laws faithfully executed, implies a power to forbid their execution, is a novel construction of the constitution, and entirely inadmissible,” the justices wrote.”
https://www.propublica.org/article/trump-impoundment-appropriations-congress-budget