Limits of Presidential Power Under a National Emergency

Scharlack
11 hours ago
7 min read

by José Rubens Scharlack

Sweeping executive actions are once again reshaping the legal and economic landscape — from tariffs and financial restrictions to drastic immigration controls. While these measures may be explored from the standpoint of political ideology or global strategy, a deeper — and perhaps more urgent — legal question underlies them all: Has the executive crossed the line of constitutionally delegated powers?

This article explores the legal foundations and limits of presidential authority in times of national emergency, focusing on tariffs, sanctions, and other economic actions. It maps the constitutional and statutory frameworks that enable emergency actions, and pinpoints when the executive’s behavior may stray beyond the law.

Congress’s Constitutional Powers

The Constitution vests in Congress’s hands the power to legislate on foreign trade (Article I, section 8, clause 3); taxes and tariffs (Article I, section 8, clause 1); immigration and naturalization (Article I, section 8, clause 4); and declarations of war and international sanctions (Article I, section 8, clause 11).

The Constitution also assigns the president the role of conducting foreign policy and serving as commander in chief (Article II), allowing the executive to act more swiftly in emergency contexts. It is based on this dynamic that Congress may delegate certain powers to the president — as long as it provides clear guidance. Without guidance, that delegation is unconstitutional.

Emergencies and the Legal Scaffolding of Presidential Power

Behind most of the president’s recent executive actions lies a series of statutes passed by Congress over the past century that give him vast powers if a national emergency is declared. Today, more than 40 national emergencies are in effect in the United States, triggering those laws. Two statutes are central.

The National Emergencies Act, passed in 1976, was originally intended to curb the expansion of executive authority accumulated during the Vietnam War and Watergate scandal. Before its enactment, presidents had declared over 470 emergencies, many of which remained open-ended and unreviewed. The act introduced important procedural constraints:

Presidential declaration requirement: No powers are activated unless the president formally declares a national emergency.
Reporting obligation: The president must specify which statutory powers are being invoked.
Annual renewal: Each emergency automatically expires after one year unless explicitly renewed by the president.
Congressional termination: Congress may end any emergency via a joint resolution (although the president can veto it, requiring a two-thirds override).

The International Emergency Economic Powers Act (IEEPA), enacted in 1977, grants the president sweeping powers to regulate international commerce once a national emergency is declared under the National Emergencies Act, provided the threat is “unusual and extraordinary,” and originating “in whole or substantial part outside the United States.”

Under IEEPA, the president may (1) block or freeze foreign assets, (2) restrict importation and exportation of goods or technology, (3) impose financial sanctions, including prohibiting payments or transactions, and (4) regulate foreign investments and business dealings.

Other federal statutes grant sweeping powers to the executive in matters of foreign policy, economic sanctions, and immigration. The 2016 Global Magnitsky Human Rights Accountability Act authorizes the president to impose sanctions on foreign individuals or entities accused of serious human rights abuses or corruption, without the need for judicial process or foreign due process rights. The Immigration and Nationality Act gives the president unilateral authority to suspend the entry of any foreign nationals deemed detrimental to U.S. interests. Similarly, the Trade Expansion Act of 1962 allows the president to impose tariffs based on national security. Finally, statutes like the International Security and Development Cooperation Act and the Foreign Assistance Act permit the suspension of foreign aid based on executive determinations of human rights violations or threats to democratic institutions.

While Congress created these statutes to equip the executive with flexibility in times of real crisis (for example, terrorism, war, or cyberattacks), the standards are alarmingly vague. Terms like “unusual,” “extraordinary,” or “national emergency” are undefined, and their invocation is largely discretionary. Many of those statutes (with exceptions, such as the Global Magnitsky Act) provide no requirement that the threat (1) be immediate or substantiated by evidence, (2) relate to hostile actors or warlike conditions, or (3) undergo congressional or judicial review before actions are taken. This, in practice, allows the president to trigger a chain of powerful economic tools simply by declaring a national emergency.

Thus, when the president imposes a 40 percent tariff on Brazil, freezes assets of Chinese companies, or suspends visa programs, the underlying statutory mechanism is the same — a declaration of emergency that activates laws without meaningful checks and balances.

Where Must Congress Draw the Line?

While Congress has constitutional authority to delegate certain powers to the executive, the Supreme Court has established that this delegation is valid only when it is accompanied by intelligible principles (nondelegation doctrine) and does not involve decisions of vast political and economic significance absent clear congressional authorization (major questions doctrine). These doctrines were present in precedents like Panama Refining¹ and Schechter Poultry,² in which the Court invalidated laws that granted the president broad powers without precise legislative direction. In more recent cases, such as Gundy³ and West Virginia v. EPA,⁴ the Court revisited those limits. In Gundy, a plurality upheld the delegation at issue, but several justices signaled a willingness to revive a stricter nondelegation standard. In West Virginia, the Court solidified the major questions doctrine, holding that agencies may not decide matters of vast economic or political significance without clear congressional guidance. Together, these doctrines underscore the constitutional requirement that Congress — not the executive — must make fundamental policy choices, especially when executive actions affect individual rights, regulate key economic sectors, or alter the balance among branches of government.

However, the same Supreme Court has also shown reluctance to review presidential acts grounded in national emergency declarations, citing institutional deference to the executive, particularly on matters involving immigration, foreign policy, or national security. In Trump v. Hawaii,⁵ the Court upheld broad immigration restrictions imposed by the president based on whether nationals of other countries present a “security threat,” even amid allegations of religious discrimination. In Dames & Moore,⁶ the Court recognized extraordinary executive powers to settle litigation with Iran, based on implicit congressional approval and later acquiescence. These precedents show that once an “emergency” is invoked, there is a real risk that checks and balances will weaken, unless Congress imposes explicit safeguards in the statutory texts that delegate power to the executive.

Thus, congressional guidance to the executive is required, but to what extent and under what circumstances? That is not entirely clear and lies largely in the hands of the courts.

A Judicial Landmark in the Making: The Tariffs Case

In V.O.S. Selections,⁷ the Federal Circuit affirmed a ruling by the Court of International Trade that set aside five executive orders imposing tariffs under IEEPA, the National Emergencies Act, and the Trade Act of 1974.⁸ The court understood that Congress’s delegation of the power to tax imports is not found in IEEPA, and thus the executive orders run afoul of the major questions doctrine. The concurring opinion concluded that such a wide delegation of powers by Congress as intended by the federal administration (a mandate to impose almost worldwide tariffs), if it existed (which the court understood it does not), would ultimately violate the nondelegation doctrine and thus be unconstitutional.

Although the Federal Circuit agreed with the lower court’s legal reasoning,⁹ its decision was automatically stayed before the petition for certiorari was granted. This stay prevented the ruling from taking immediate effect, although it remains a powerful statement on the judicial limits of presidential discretion in economic and foreign affairs.

Crucially, the original Court of International Trade decision — now affirmed — not only questioned the procedural irregularities involving the imposition of the tariffs, but also struck them down on constitutional grounds, framing them as an impermissible use of emergency powers disconnected from congressional intent. It shows that, even in times of perceived urgency, the president is not free to legislate unilaterally and that economic sanctions must adhere to the statutory and constitutional limits imposed by Congress.

This case may well become a landmark in modern nondelegation jurisprudence. If the Supreme Court upholds the lower court decisions, it could reinvigorate limits on executive economic powers, reset the balance between the branches, and offer clarity to importers and international partners that face legal uncertainty.

Above all, V.O.S. Selections is a timely reminder that litigation remains a critical institutional safeguard, especially when Congress is silent or passive and the executive appears to act beyond his mandate under a veil of emergency.

Seeing the Line to Protect It

Identifying “the line” is not a theoretical exercise. It is a practical necessity for protecting the American legal system and its foundations. By understanding the legal framework and judicial precedents that define the limits of executive action in times of emergency, it becomes easier to identify when and why that line has been crossed.

When there is oversight, legitimate action is possible. When it is lacking, arbitrariness may take hold. It is the duty of democratic institutions, civil society, and the legal profession to act so that the line is not blurred. ________

FOOTNOTES

¹ Panama Refining Co. v. Ryan, 293 U.S. 388 (1935).

² Schechter Poultry Corp. v. United States, 295 U.S. 495 (1935).

³ Gundy v. United States, 588 U.S. 128 (2019).

⁴ West Virginia v. EPA, 597 U.S. 697 (2022).

⁵ Trump v. Hawaii, 585 U.S. 667 (2018).

⁶ Dames & Moore v. Regan, 453 U.S. 654 (1981).

⁷ V.O.S. Selections Inc. v. Trump, Nos. 25-1812, 25-1813 (Fed. Cir. Aug. 29, 2025), cert. granted, Nos. 24-1287, 25-250 (U.S. Sept. 9, 2025).