War Powers and the Supreme Court

DESCRIPTION: The constitutional and political authority to protect the nation from its enemies and to place US military forces abroad in hostile situations.

SIGNIFICANCE: The vagueness of the parts of the Constitution dealing with war powers caused the president and Congress to disagree about their interpretation. The Supreme Court ruled on a number of cases involving the legitimate use of military force in foreign lands.

Article I, Section 8 of the US Constitution grants Congress the power to tax and spend for the common defense, to declare war, to raise and support armies and a navy, and to make rules for the government of such forces. The Constitution (Article II, Section 2) makes the president commander in chief and gives them the power to make treaties and appoint ambassadors with the advice and consent of the Senate. Although Congress has the power to declare war, from the nation’s beginnings, presidents have claimed the authority to place military troops abroad and to wage war. The United States has issued formal declarations of war on eleven occasions, covering five major conflicts: the War of 1812, the Mexican-American War (1846–48), the Spanish-American War (1898), World War I (1917–18), and World War II (1941–45). Of those, only the War of 1812 was actively debated by Congress before a formal declaration of war was made. Nevertheless, military troops have been deployed hundreds of times in various military actions abroad.

In Bas v. Tingy (1800), the Supreme Court recognized that Congress could authorize war both by a formal declaration and by passing statutes that recognized a state of “limited,” “partial,” or “imperfect” conflict. A sharply divided court upheld President Abraham Lincoln’s blockade of Confederate ports in the Prize Cases (1863), stating that while Lincoln did not have the power to initiate a war, he did have the authority to meet force with force without any special legislative authority. The Court gave further support to presidential power in the conduct of foreign affairs in United States v. Curtiss-Wright Export Corp. (1936) and United States v. Belmont (1937), asserting that the president was the sole representative of the nation in its foreign relations and affairs.

The aftermath of World War II saw the rise of the United States to world power status and the development of permanent standing armies, factors not anticipated by the Framers of the Constitution. Beginning with the administration of Thomas Jefferson and Abraham Lincoln, through Franklin D. Roosevelt, presidents have argued for an expansive reading of the executive war powers to meet the needs of national security. With few exceptions, the federal courts have been unwilling to involve themselves in the conflict between the legislative and executive branches over the exercise of war powers, calling the issue a political question and inappropriate for judicial resolution. Central to the war powers debate has been the legality and applicability of the War Powers Resolution of 1973, which sets time and communications requirements upon any military troop deployment by the president. In response to the Iraq War of the early twenty-first century (2003–11), many members of Congress have argued that the War Powers Resolution must be revisited, and discussions are necessary as to the extent to which the president can make decisions about military campaigns. In 2023, the US House of Representatives voted to repeal the 1991 and 2002 authorizations for the Iraq War, reflecting renewed efforts to reassert congressional authority over war powers. This momentum culminated in 2025, when the Fiscal Year 2026 National Defense Authorization Act officially repealed both the 1991 and 2002 Iraq-related Authorizations for Use of Military Force (AUMF), but not the 2001 AUMF.

Bibliography

“ArtI.S8.C11.2.5.1 Overview of Supreme Court Jurisprudence and War Powers.” Constitution Annotated, constitution.congress.gov/browse/essay/artI-S8-C11-2-5-1/ALDE_00013916. Accessed 7 Apr. 2026.

“Congress Inches Toward Reclaiming War Powers with AUMF Repeals.” Roll Call, 24 Dec. 2025, rollcall.com/2025/12/24/congress-inches-toward-reclaiming-war-powers-with-aumf-repeals/. Accessed 7 Apr. 2026.

Dirck, Brian R. Waging War on Trial: A Handbook with Cases, Laws, and Documents. ABC-CLIO, 2003.

Ebright, Katherine Yon. “Curb the President’s War Powers to Prevent Future Iraqs.” Brennan Center for Justice, 23 Mar. 2023, www.brennancenter.org/our-work/analysis-opinion/curb-presidents-war-powers-prevent-future-iraqs. Accessed 7 Apr. 2026.

Ely, John Hart. War and Responsibility. Princeton UP, 1993.

Fisher, Louis. Presidential War Power. University Press of Kansas, 1995.

Moore, James. Bush’s War for Reelection: Iraq, the White House, and the People. John Wiley & Sons, 2004.

Ng, Wendy L. Japanese American Internment During World War II: A History and Reference Guide. Greenwood Press, 2002.

“Overview of Supreme Court Jurisprudence and War Powers.” Constitution Annotated, Library of Congress, constitution.congress.gov/browse/essay/artI-S8-C11-2-5-1/ALDE_00013916/. Accessed 7 Apr. 2026.

Plagakis, Sofia, and Barbara Salazar Torreon. Instances of Use of United States Armed Forces Abroad, 1798–2023. Congressional Research Service, 7 June 2023, https://www.congress.gov/crs-product/R42738. Accessed 7 Apr. 2026.

Ramsey, Michael D., and Stephen I. Vladeck. “Interpretation: Commander in Chief Clause.” National Constitution Center, constitutioncenter.org/the-constitution/articles/article-ii/clauses/345. Accessed 10 Apr. 2026.

Woodward, Bob. Bush at War. Simon & Schuster, 2002.

United States, Congress. H.R. 932 — Repeal of Authorizations for Use of Military Force Against Iraq Resolution. 118th Congress, congress.gov/bill/118th-congress/house-bill/932. Accessed 7 Apr. 2026.