Using Military Inside the U.S. — Week of Mar 3, 2025

During the first week of March 2025, President Trump made several moves that expanded emergency powers and deployed national security tools in ways that challenge the traditional line between foreign threats and domestic policy.

In his address to Congress on March 4, the President declared he had deployed the U.S. military to the southern border to "repel the invasion of our country." This might matter because calling immigration an "invasion" and sending troops to address it might weaken the longstanding legal protections — especially the Posse Comitatus Act — that prevent the military from being used as a domestic police force, a safeguard that exists to keep civilian governance separate from military control.

Later that week, the President formally notified Congress that he was expanding the border emergency to cover fentanyl trafficking from China, Canada, and Mexico — and using that expanded emergency to justify tariffs on goods from all three countries. The administration argues these actions are necessary to protect American lives from a fentanyl crisis killing tens of thousands each year. However, stretching a border security emergency to cover international trade sanctions sets a precedent for using emergency powers far beyond their original purpose.

Separately, during a March 6 signing ceremony, the President signed an order suspending security clearances for the law firm Perkins Coie, with plans to target additional firms. The stated reasons involved "lawfare" — essentially, the firm's history of representing clients in cases against the government. Using national security tools to penalize lawyers for their legal work raises concerns about chilling the right to legal representation.

Alternative explanations to consider: Most importantly, presidents of both parties have sent troops to the border before, and the current actions may be more about political messaging than a fundamental shift in civil-military relations. Additionally, IEEPA has been invoked for trade-related actions in the past, and Congress has chosen not to restrict this authority. These emergency measures may also be intended as temporary responses to genuine crises, with the expectation of returning to normal governance once conditions improve.

Limitations: This analysis is based on published government documents and AI-assisted review. It does not reflect court rulings, congressional responses, or details about actual military operations on the ground.