The Impoundment Control Act of 1974 and the Power of the Purse

In October 1972, Congress passed a sweeping new law to clean up the nation's rivers and lakes, the measure we now call the Clean Water Act. Richard Nixon vetoed it, calling the price tag budget-wrecking. Congress overrode the veto by enormous margins in both chambers, with Republicans and Democrats alike voting to make the bill law over the president's objection. That should have settled it. Instead, Nixon's administration simply declined to hand out much of the money. The law authorized billions of dollars for states and cities to build sewage treatment plants; the administration allotted only a fraction of it. A president who had lost the argument in Congress, and lost the override, had found a way to win anyway, by treating an appropriation as a ceiling rather than a command. New York City sued. The case would reach the Supreme Court, but by then Congress had already decided it could not wait for judges.

In short: Nixon's habit of refusing to spend money Congress had appropriated led to the Impoundment Control Act of 1974, which says a president who wants to cancel funds must ask Congress, and gets nothing if Congress does not agree. The Government Accountability Office polices the law and can sue. In 2025 the act was tested as never before, as the administration froze grants across the government and its budget director argued the law itself is unconstitutional.

An old practice turned into a weapon

Presidents had declined to spend appropriated money before Nixon. Thomas Jefferson famously held back funds Congress provided for gunboats on the Mississippi when the Louisiana Purchase removed the need. Franklin Roosevelt and Harry Truman delayed military spending; John Kennedy and Lyndon Johnson withheld funds for various programs. Most of these cases shared a feature: the president was saving money where the purpose had become unnecessary or could be achieved more cheaply, or was managing timing, and Congress generally tolerated it.

Nixon's impoundments were different in scale and in purpose. After his landslide reelection in 1972, his administration withheld funds across a long list of domestic programs, including housing subsidies, rural development, water pollution control and highway money, in amounts that ran into the billions. The point was not to avoid waste on a project that no longer made sense. It was to end programs the president opposed, without going through the process of persuading Congress to repeal them.

That distinction is the heart of the matter. The Constitution says no money shall be drawn from the Treasury except in consequence of appropriations made by law, which gives Congress control over what is spent. It also says the president shall take care that the laws be faithfully executed. An appropriation is a law. A president who refuses to carry it out because he disagrees with it is not executing the law; he is exercising a veto that the Constitution does not give him, one that Congress cannot override.

Why the framers gave the purse to Congress

The decision to put spending in the legislature's hands was not an accident of drafting. The framers had watched a century of struggle in England between kings and Parliament, much of it fought over money: monarchs who raised revenue without consent, Parliaments that refused to fund wars until grievances were addressed. By the time of the American Revolution, the principle that the people's representatives control taxing and spending was close to the centre of what Americans thought liberty meant. Taxation without representation was, after all, the slogan of the revolution.

James Madison made the point directly in The Federalist No. 58, describing the power over the purse as "the most complete and effectual weapon" a constitution could give the people's representatives. The House, closest to the voters and elected every two years, would originate revenue bills. Congress as a whole would decide what money could be spent and for what.

That arrangement has a practical logic as well as a historical one. Spending decisions involve trade-offs among regions, industries and groups of people. A legislature, with members from every district and both parties, is designed to make those trade-offs in public, through votes that can be recorded and punished at the next election. A single executive making the same decisions quietly, by declining to spend, removes both the deliberation and the accountability. That is the core reason the impoundment fight is not a technical quarrel among budget officers. It goes to who governs.

What the 1974 law built

Congress responded with the Congressional Budget and Impoundment Control Act, which Nixon signed on July 12, 1974, less than a month before he resigned over Watergate. Most of the law concerns Congress's own budget process. It created the House and Senate Budget Committees and the Congressional Budget Office, giving lawmakers their own independent source of budget numbers so they no longer had to rely on the White House's Office of Management and Budget.

The impoundment provisions, in the law's final title, set out two narrow paths for a president who does not want to spend money as Congress directed.

The first is a rescission. The president sends Congress a special message proposing to cancel specific funds and explaining why. The money can be withheld for up to 45 days of continuous session while Congress considers the request. If Congress passes a bill approving the rescission, the funds are cancelled. If it does not act within that window, the money must be released and spent. Silence means no.

The second is a deferral, a temporary delay. A deferral cannot extend beyond the end of the fiscal year, and amendments and court rulings since 1974 have limited deferrals to reasons such as contingencies or efficiency, not disagreement with the policy. A president who wants to slow spending because a program's purpose can be achieved more cheaply may defer; a president who wants to starve a program he dislikes may not.

The law also gave the Comptroller General, the head of the Government Accountability Office, the duty to review every presidential message, to report to Congress any impoundment the president failed to report, and the authority to go to court to make the executive branch release the money.

The Supreme Court weighs in

In February 1975 the Supreme Court decided the New York City case, Train v. City of New York, unanimously. The Court held that the Clean Water Act required the administration to allot the full amounts Congress had authorized; the administrator of the Environmental Protection Agency had no discretion to hand out less. The ruling turned on the language of that particular statute, not on a broad constitutional holding about impoundment. But its message was plain: when Congress says to spend, the executive spends.

Later rulings drew the boundary from the other direction. In 1998, in Clinton v. City of New York, the Court struck down the Line Item Veto Act, which had let the president cancel individual spending items after signing a bill. The Constitution, the Court said, sets out a single procedure for making and changing laws, passage by both houses and presentment to the president, and a president cannot amend a law by cancelling parts of it unilaterally. Progressives and conservatives both cite this case in impoundment fights, because it establishes that the power to undo a spending law belongs to Congress.

GAO, the quiet referee

For most of the next half-century, the Impoundment Control Act worked through routine. Presidents of both parties sent rescission proposals; Congress approved some and ignored others; GAO issued opinions when it suspected an unreported impoundment. It was the sort of law that rarely made headlines.

The exception that drew attention came in 2019. During President Trump's first term, the Office of Management and Budget held back military aid that Congress had appropriated for Ukraine. In January 2020, GAO issued a decision concluding that the withholding violated the Impoundment Control Act, because the administration had delayed the money for a policy reason, not one the law allows. That finding became part of the record in the first impeachment trial.

GAO's decisions are not court judgments. The agency can sue, but it has rarely done so, and the opinions carry weight mainly because Congress and agencies have historically respected them. That reliance on respect, rather than enforcement, is the law's soft spot. It also means the act's force rises and falls with Congress's own appetite for a fight. A Congress controlled by the president's party may hear about a GAO finding, issue a statement and move on; a Congress controlled by the other party may hold hearings, subpoena budget officials and write the finding into the next spending bill. The statute is the same in both cases. The consequences are not.

The 2025 test

Beginning in January 2025, the administration paused or froze large amounts of federal money across agencies: grants for clean energy and electric vehicle charging, funds under the infrastructure and climate laws passed in 2021 and 2022, foreign assistance, research grants, money for libraries and museums, and more. Some freezes were reversed within days after confusion and lawsuits; others lasted for months. Courts in several cases ordered funds released, often on the ground that agencies had acted arbitrarily or ignored statutory requirements.

GAO opened investigations into dozens of freezes and, over the course of 2025, issued decisions finding that several of them violated the Impoundment Control Act. Its findings included the withholding of funds Congress had provided for electric vehicle charging stations.

The administration's response went beyond disputing particular cases. Russell Vought, the director of the Office of Management and Budget, has argued for years that the Impoundment Control Act is unconstitutional, that it intrudes on a president's inherent power to manage spending, and that presidents before Nixon exercised a broad impoundment authority the 1974 law wrongly took away. He and others have said they would welcome a Supreme Court test of the question. Later in 2025, the administration used a procedure called a pocket rescission to let billions of dollars in foreign aid expire, a move covered in a separate post on this site.

The other side's argument, and an answer

The case for impoundment power runs like this. Federal spending is enormous, and Congress often appropriates more than a program can use well. A president who is responsible for executing the laws should have flexibility not to waste money. Before 1974, presidents commonly declined to spend, and the Constitution does not say in so many words that an appropriation is a mandate to spend every dollar. And the debt is large; anything that lets a president hold back spending is, on this view, a check on a Congress that cannot discipline itself.

There are real points in there. Appropriations do sometimes fund things that turn out to be unnecessary, and the 1974 law already accommodates that: a president can propose a rescission, and Congress can approve it quickly when the case is good. In 2025 Congress did approve a rescission package of about nine billion dollars, cutting foreign aid and funding for public broadcasting, which shows that the process works when the votes are there.

The deeper problem with the inherent-impoundment argument is what it would do to the constitutional design. If a president can decline to spend money Congress appropriated whenever he disagrees with the purpose, then every appropriations law becomes a suggestion, and the only spending that actually happens is spending the president favours. Congress would be left negotiating with the executive branch over its own laws, after they pass. Debt and waste are serious concerns, but the remedy the Constitution provides is a veto at the time a bill is passed, and an election afterward, not a permanent second veto exercised quietly by budget officials.

I would add a self-critical note for Democrats. Congressional majorities of both parties have spent years writing appropriations bills in ways that give the executive enormous discretion, through lump sums and vague directions, and then complaining when a president uses it. Tighter drafting, specific deadlines for obligating funds and explicit reporting requirements would make impoundment fights easier to win. The 2025 disputes are a reason to draft more carefully, not only a reason to litigate.

What you can do

The power of the purse is Congress's most important power, and it depends on members being willing to defend it.

• Ask your representative and senators how they will enforce the law. With the representatives lookup, find their phone numbers, contact forms and latest votes, and ask whether they support giving GAO stronger tools, such as faster court access and automatic penalties, to enforce the Impoundment Control Act.
• Watch the votes on spending bills. The Congress votes and bills page follows what passes and fails in both chambers, including appropriations and rescission packages.
• Follow the courts. Challenges to frozen grants and to the act itself keep reaching the Supreme Court; Court watch lists this term's opinions and emergency orders with the Court's own summaries.
• Keep up with the larger fight. Our topic page on Democrats in Congress gathers coverage of how the new majority plans to use its oversight and appropriations powers when it is sworn in in January 2027.
• Support the local recipients. Many frozen grants paid for community health centres, libraries and clean water projects; local nonprofits that lost funding are listed in the organizations directory.

New York City's sewage plants were eventually built with the money Nixon tried to hold back. The rivers that run past them are cleaner because a city sued and a Congress that had overridden a veto decided its laws were not suggestions. That decision has to be made again by every Congress, in every generation.