On September 13, 2019, the Trump administration issued Determination 2019-20366, formally continuing the exercise of authorities granted under the Trading With the Enemy Act. This 1917 statute grants the president exceptional power to regulate financial transactions, freeze assets, and restrict trade with designated adversaries during periods of national emergency or conflict. By issuing this determination, the administration preserved its ability to unilaterally control which foreign nations and entities Americans could conduct business with, without requiring congressional approval for specific transactions or ongoing legislative authorization.

The direct effects ripple across American commerce and finance. Multinational corporations, banks, investment firms, and individual entrepreneurs operating internationally face restrictions on dealings with adversaries designated under this authority. Financial institutions must maintain compliance infrastructure to prevent prohibited transactions, incurring significant administrative costs. American citizens traveling to or conducting business in restricted nations face potential legal liability. The determination maintained existing prohibitions affecting Iran, North Korea, Syria, and other designated adversaries, constraining legitimate commercial activity and banking relationships.

This action reflects the Trump administration's broader escalation of executive power in foreign affairs, evident in the parallel Iran emergency continuation issued in 2026 and the expedited $8.6 billion arms sales that circumvented congressional oversight. Each action incrementally concentrates control over international relations in executive hands while reducing legislative checks. The Trading With the Enemy Act continuation provides the legal scaffolding for unilateral sanctions regimes that bypass traditional treaty-making and negotiation processes, shifting American foreign policy toward executive decree rather than democratic deliberation.

Reversal would require either congressional action repealing or substantially reforming the Trading With the Enemy Act—unlikely given bipartisan support for executive flexibility on national security matters—or a future administration declining to renew the determination. Short of statutory change, the authority remains available to any sitting president, perpetuating the precedent of unilateral executive control over international commerce.