What do atomic bombs and fentanyl have in common? As of December 15, 2025, they are both classified as “Weapons of Mass Destruction” (WMDs) by the American government. Of course, one cannot claim that fentanyl is not destructive: An estimated 73,000 Americans died from fentanyl overdoses (either from illicit drugs laced with fentanyl or fentanyl alone) in 2023 alone. But likening fentanyl to Fat Man and Little Boy is, at best, a stretch. The drug is not manufactured as a weapon, nor is it intended for mass destruction.
Let us clarify that this recategorization is not a solution to the opioid crisis, nor can we be confident that it is intended to be one. While Executive Order 14367 purports to support Americans’ “well-being,” the obvious, evidence-backed solution is not supply-centric — it is increased access to medication-assisted addiction treatment (real treatment — not pseudoscientific “healing farms”). A government that suspended $140 million in “fentanyl overdose response efforts” does not seem too interested in supporting addiction treatment. What, then, incentivized President Donald Trump’s administration to stretch WMD status to include fentanyl?
There is a legal basis for elevating chemical agents to WMD status. Congress’ definition of a WMD includes weapons that are “designed or intended to cause death or serious bodily injury through the release, dissemination, or impact of toxic or poisonous chemicals, or their precursors.” Anthrax and sarin, for example, both fall neatly within this definition.
But while these biochemical agents are of little use beyond bioterrorism, fentanyl has legitimate pharmaceutical applications. It is an effective countermeasure against “severe chronic pain” (especially relevant in the context of today’s chronic pain epidemic), and it is not produced with the intention of weaponization. Even suppliers of illicitly-manufactured fentanyl (IMF) have a multibillion-dollar financial incentive to keep their buyers alive. Moreover, a fentanyl analog has only been weaponized once on a mass level (by Vladimir Putin in Russia in 2002, as a counterterrorism measure). There is little evidence that any terrorist group plans to weaponize fentanyl anytime soon.
Much of Trump’s rhetoric supporting WMD regulation as an approach to the fentanyl crisis is either misleading or utterly incorrect — sure, “no bomb…kills 200,000 to 300,000 people every year,” but neither does fentanyl. If we turn to the relevant statutes, the administration’s rationale is clear: a desired expansion of executive power that transfers law enforcement authority from state and local agents to federal military and security forces who have exclusive jurisdiction over WMD regulation. Practically, rather than supporting Americans struggling with addiction, this executive order opens the door for further military encroachment on everyday law enforcement.
Contrary to the battlefield imagery evoked by the War on Drugs slogans of the 1970s, the military does not enforce drug legislation. This task instead falls to civilian law enforcement. The Drug Enforcement Administration (DEA) is housed within the Department of Justice — a separate branch from the military. The distinction between military and police forces is an essential check on executive power — a principle long considered a fundamental American value. The Posse Comitatus Act generally prohibits “federal troops from participating in civilian law enforcement” and is recognized today as a necessary bulwark to protect American democracy from “large standing [armies].”
The fentanyl crisis, until now, has been no exception. Domestic fentanyl regulation is enforced by the DEA — not by the military. But Executive Order 14367 directs executive agencies to treat illicit fentanyl as a WMD and to include fentanyl in the Armed Forces’ directives regarding “chemical incidents in the homeland.” This implicates statute 10 USC § 282, which relaxes the Posse Comitatus Act’s checks on federal power when WMDs are involved and gives the Secretary of Defense leeway to “provide assistance in support of Department of Justice activities relating to the enforcement” of chemical WMD regulation. Now that the executive branch treats fentanyl as a WMD, the Trump administration could take military action to domestically enforce fentanyl regulations.
There is a difference between federal forces supplying “indirect logistical support for law enforcement operations” and “[engaging] directly in law enforcement activities.” Under the courts’ interpretations of 10 USC § 282, the former is legal while the latter is criminal. But the line between “indirect logistical support” and direct engagement is too easily blurred. Take, for example, the involvement of federalized National Guard troops in a Coachella Valley marijuana raid in June 2025. Though the 9th US Circuit Court of Appeals deemed the troops’ deployment reasonable for “protect[ing] federal personnel” amid the Los Angeles protests, there are few reasons to believe that this standard law enforcement task required military support. Furthermore, the DEA has released little information about whether the National Guard played a direct role in, or merely facilitated, the raid.
Military forces operating in the domestic sphere are not subject to the same legal constraints as civilian law enforcement. While both police and military are bound by Fourth Amendment search and seizure doctrine, military personnel acting in a law enforcement capacity exist in a much murkier constitutional space. The Exclusionary Rule, which prevents law enforcement from using evidence obtained in violation of Fourth Amendment protections in court, typically disincentivizes unreasonable search and seizure, but it is unclear whether the military is also held accountable by this rule. As a result, courts are often more reluctant to extend it beyond civilian law enforcement.
Military and police also operate under drastically different standards for the use of force. Police officers are “appropriately trained” to perform law enforcement duties, and civilian law enforcement agencies employ a “higher proportionality standard” than military forces in domestic peacekeeping. The latter are generally unfamiliar with the de-escalation and community accountability standards which guide civilian law enforcement officers.
To be clear, executive orders do not make law. They do, however, set precedent and dictate the actions of the executive branch. So, while there is no guarantee that the Trump administration will resort to militarized measures to address the fentanyl crisis, Executive Order 14367 establishes a realm of legal uncertainty for the administration to test the boundaries of constitutionality.
Much of this theorizing is hypothetical, but the risks are real. What we know for sure is that military forces in Trump’s America play an increasing (and legally contested) role in domestic policing. In the context of an aggressive administration that has thus far invaded Venezuela and deployed armored vehicles in Los Angeles, these emerging questions about the legality of military intervention in domestic drug enforcement warrant our attention and scrutiny. Trump loves to push the limits of executive power; why would fentanyl be the exception?