Will Trump impose martial law before his term ends?

Ex parte Milligan established critical limits on military jurisdiction over civilians. Ex parte Milligan (1866) set a foundational precedent in American law, holding that military tribunals lack jurisdiction to try civilians where civil courts are open and operating, even during times of war ^[1]. This ruling underscored the principle that constitutional rights, particularly the right to trial by jury, remain paramount unless civil judicial functions are demonstrably suspended by actual invasion or rebellion ^[1]. This precedent serves as a critical check on executive power regarding military jurisdiction over civilians ^[3].

Conservative groups advocate expanded presidential authority under the Insurrection Act. Influential conservative policy groups, such as the Center for Renewing America (CRA), are advancing interpretations of the Insurrection Act of 1807 that could significantly expand the permissible domestic role of the military. In their brief, "On the President’s Lawful Authority to Deploy the National Guard to American Cities," the CRA argues for a broad and "sweeping" presidential authority to deploy federal forces, including the National Guard when federalized, to suppress insurrections and enforce federal laws ^[2]. Authored by individuals including Russ Vought, President of CRA, this position emphasizes the President's role as the nation's chief law enforcement officer, asserting that such deployment is permissible even without the consent of state governors, particularly when state and local authorities are deemed unwilling or unable to act ^[2].

Expanded military roles could blur civilian and military jurisdictional boundaries. While the Center for Renewing America's interpretation ^[2] primarily focuses on the President's authority to deploy military forces for law enforcement and to restore order, it does not explicitly advocate for military tribunals for civilians. However, by advancing such a wide-ranging interpretation of the Insurrection Act to justify extensive domestic military deployment in "American cities" where civil courts are undeniably open, this position could be seen as seeking to neutralize the spirit of Ex parte Milligan ^[1]. The practical implication of an expansive military role in civilian law enforcement could create situations where the boundaries between military and civilian jurisdiction become blurred, thereby challenging the strict limitations on military authority over civilians that Milligan sought to establish and uphold ^[1].

Michael Flynn advocates for significant domestic military intervention and martial law. A retired Lieutenant General and former National Security Advisor, Flynn has publicly called for imposing martial law and using the military domestically to "rerun" elections ^[1]. These proposals have drawn strong criticism from retired officers and were viewed by some as undermining the Constitution, prompting the Pentagon to reaffirm the military's constitutional role ^[1]. Flynn has also authored works describing a "world at war" and an "enemy within," portraying current political challenges as a national struggle ^[3]. He is considered a potential candidate for Secretary of Defense ^[4].

Kash Patel primarily focuses on reforming and investigating federal agencies. A former Trump administration official, Patel has concentrated on reforming federal agencies such as the FBI and compiling lists of officials within agencies like the FBI and Department of Justice for potential targeting ^[2]. His views predominantly concern the functioning and accountability of domestic federal agencies, thereby relating to the domestic exercise of governmental power ^[2]. However, the provided sources do not detail his specific views on direct military involvement in domestic affairs ^[2]. Regarding Stephen Miller, the available web research results do not contain information on his publicly stated views or career histories concerning civil-military relations and the domestic use of armed forces.

National security analysts do not model specific invocation thresholds. The research indicates that national security analysts do not model specific, quantifiable thresholds or metrics for invoking the Insurrection Act. Instead, the Act's invocation relies on qualitative assessments of civil unrest, primarily focusing on the inability or unwillingness of state and local authorities to suppress an insurrection, domestic violence, or to enforce federal law and constitutional rights ^[1]. A key condition for presidential action is when state and local forces are deemed incapable of controlling the unrest ^[1].

The Insurrection Act outlines qualitative conditions for presidential action. This Act grants the President extensive power to deploy the U.S. military domestically under defined qualitative conditions. These conditions include situations where "insurrection" or "domestic violence" impedes the enforcement of federal laws, or when such disturbances deprive citizens of constitutional rights and state authorities are unable or unwilling to offer protection ^[2]. Historical instances, such as the Los Angeles riots in 1992, demonstrate invocation when state authorities requested federal assistance due to the magnitude of the unrest ^[3]. While events like the 2020 George Floyd protests and the January 6th riot prompted discussions about potentially invoking the Act, the available research does not show that these events led to the development or public disclosure of specific, quantifiable triggers being modeled by analysts ^[4]. Debates around these events centered on whether existing legal conditions for invocation were met, particularly regarding whether state and local authorities were overwhelmed or federal laws obstructed ^[1]. Even broader analyses of societal conflict do not provide numerical thresholds for triggering the Insurrection Act, but rather address general factors influencing societal stability ^[5].

Project 2025 seeks to expand presidential power for domestic troop deployment. The policy proposals advocate for an expansive interpretation of presidential authority regarding domestic troop deployment and civil unrest, specifically aiming to utilize the Insurrection Act ^[1]. This approach is intended to bypass the restrictions of the Posse Comitatus Act, which generally limits the use of the military for domestic law enforcement ^[2]. Reports indicate that allies associated with a potential future administration plan to invoke this act to deploy federal forces in response to protests ^[1].

Project 2025 aims to redefine protests as 'insurrection'. Within Project 2025's framework, certain dissent and protest activities are characterized as 'insurrection' or actions by 'enemies,' providing a rationale for deploying military forces domestically under the Insurrection Act ^[3]. While the 'Mandate for Leadership' outlines a broad blueprint for presidential action and a more robust application of existing authorities, the available sources describe the intent and policy directions but do not present specific drafts of executive orders or administrative documents to formalize these reclassifications or streamline troop deployment procedures ^[3].

A state governor cannot lawfully refuse a presidential order to federalize their National Guard units. The President possesses clear statutory authority to call the Guard into federal service without gubernatorial consent, a power affirmed by the Supreme Court. Once federalized, National Guard units transition from state command to federal control, acting under the direction of the President as Commander-in-Chief. Governors lack any legal command-and-control protocols that would allow them to lawfully refuse or recall these units ^[3].

Presidential authority to federalize the Guard primarily stems from Title 10. The legal mechanisms for this are established in 10 U.S.C. § 12406, which empowers the President to call National Guard members and units into federal service. This authority is for purposes such as suppressing insurrections, repelling invasions, and enforcing federal laws when other means are insufficient ^[1]. Notably, presidential orders to federalize these units do not require the consent of state governors ^[1].

The Supreme Court firmly supports presidential federalization authority in this matter. The current legal consensus, established by the Supreme Court, supports this presidential power. The case of Trump v. Illinois addressed the federalization of the National Guard, with the Supreme Court issuing a decision that, while described as 'narrow,' carried 'broad implications' for presidential power over state Guard units ^[2]. This ruling affirmed the President's ability to call the National Guard into federal service, thereby precluding a governor's lawful refusal of such an order ^[2].