WASHINGTON, July 25 — The Supreme Court’s 1936 ruling in United States v. Curtiss-Wright Export Corp. remains a cornerstone of presidential authority over foreign affairs, even as its constitutional logic continues to divide scholars. The case, born from the dusty battlefields of the Chaco War between Paraguay and Bolivia, handed the executive a doctrinal weapon it has never fully relinquished.
By June 1932, the Chaco War — a brutal territorial conflict between Paraguay and Bolivia — was drawing international revulsion. Both sides depended on foreign arms, and American manufacturers saw a market.
Antiwar sentiment at home, combined with diplomatic pressure from the United Kingdom and the League of Nations, pushed the U.S. government to act. On May 24, 1934, Congress approved a joint resolution authorising the President to embargo arms shipments to the belligerents if he found such a ban “may contribute to the establishment of peace.” That same day, President Franklin Roosevelt signed both the resolution and a proclamation establishing the embargo. Violators faced fine, imprisonment, or both.
Fifteen months later, on November 14, 1935, the proclamation was revoked. By then, however, Curtiss-Wright Export Corp. was already in legal trouble.
The company was indicted for conspiring to sell aircraft machine guns to Bolivia in violation of the embargo. The technical reality, under the hood, was a straightforward criminal case — except that the defence raised a constitutional challenge that would echo for decades.
The Non-Delegation Challenge
Curtiss-Wright demurred, arguing that Congress had unconstitutionally delegated legislative power to the executive branch — a violation of the non-delegation doctrine. The lower court agreed. The government appealed directly to the Supreme Court.
In a 7-1 decision authored by Justice George Sutherland, the Court reversed. Sutherland’s opinion drew a sharp distinction between domestic and foreign affairs.
The broad rule that the federal government can only exercise powers specifically enumerated in the Constitution, he wrote, “is categorically true only in respect of internal affairs.” Foreign affairs powers, by contrast, are “different in origin and nature.” The detail that matters: the Court held that such power is given implicitly, because the executive of a sovereign nation is, by its nature, empowered to conduct foreign relations.
It found “sufficient warrant” for the broad discretion Congress had vested in the President to determine whether enforcing the arms ban would help re-establish peace. As ever, the Constitution’s silence on foreign affairs was read as permission, not prohibition.
A Precedent That Endures
The ruling remains a key precedent for expansive presidential authority in foreign policy. It has been cited in disputes ranging from executive agreements to war powers — always by those arguing that the President’s hand is freer abroad than at home. The wry observation for today’s informed reader: a case about machine guns sold to Bolivia in the 1930s still shapes how the U.S. government justifies actions from trade embargoes to drone strikes.
What to watch next: as the current administration under President Donald Trump continues to assert broad foreign-policy discretion, the ghost of Sutherland’s opinion will almost certainly be invoked again. Whether the Court — which last term showed renewed interest in the non-delegation doctrine — would still embrace its 1936 reasoning is an open question.
The detail that matters is that Curtiss-Wright has never been overruled, and its logic sits quietly, waiting to be deployed.
