Trump DOJ Targets Denver’s Gun Ban: Shocking Move

Wall display with handguns and rifles for sale.

The Trump Justice Department is using federal civil-rights power to try to wipe out Denver’s decades-old “assault weapons” ban—testing whether blue-city gun controls can survive the Supreme Court’s modern Second Amendment rulings.

Quick Take

DOJ sued Denver on May 5, 2026, arguing the city’s 1989 “assault weapons” ordinance violates the Second Amendment.
The lawsuit spotlights the Trump administration’s new DOJ “Second Amendment Section,” built to challenge firearm restrictions more aggressively.
Denver officials rejected a prior DOJ demand to repeal the ban, calling the federal move an overreach and pledging a vigorous defense.
The case centers on whether AR-15-style rifles—owned by millions of Americans—qualify as arms “in common use” for lawful purposes under Supreme Court precedent.

DOJ’s Lawsuit Targets Denver’s 1989 Ban as Unconstitutional

The Justice Department filed suit against the City of Denver and its police department after the city refused to repeal an ordinance dating to 1989 that bans certain semi-automatic rifles labeled “assault weapons.” Federal lawyers argue Denver’s law criminalizes possession of commonly owned firearms, including AR-15-style rifles, and therefore conflicts with Supreme Court decisions protecting weapons “in common use” for lawful purposes such as self-defense.

Acting Attorney General Todd Blanche framed the case as a straightforward constitutional dispute, saying the Second Amendment cannot be treated as a “second-class right.” The DOJ position relies heavily on the idea that popularity and widespread lawful ownership matter in constitutional analysis, especially after recent Supreme Court rulings that tightened how governments must justify restrictions. Denver’s ordinance, by design, makes simple possession a crime within city limits.

Denver Rejects Federal Demand and Defends the Ordinance as Public Safety Policy

The lawsuit followed a clear escalation. On April 28, 2026, DOJ sent Denver a formal demand letter calling for repeal and an immediate stop to enforcement. Denver rejected that demand publicly on May 4–5. City Attorney Miko Brown described DOJ’s stance as “baseless” and an irresponsible federal intrusion, while Mayor Mike Johnston and city leaders argued the ordinance is meant to reduce gun violence and keep “military-style” weapons off city streets.

That split captures a familiar tension: local governments claiming room to regulate for public safety versus federal officials insisting constitutional rights set a hard boundary. For conservatives, the significant point is structural—when a city can make common firearm ownership a criminal act, rights become dependent on zip code. For liberals focused on gun-violence prevention, the concern runs the other direction: that federal litigation could erase tools cities believe help them manage crime.

A New DOJ “Second Amendment Section” Signals a Broader Federal Strategy

This is not just a one-off lawsuit. DOJ’s action is described as the first major case brought through a new Civil Rights Division Second Amendment Section, created after President Trump’s return to office to pursue firearms-rights enforcement more proactively. The Denver case also arrives amid other federal actions, including a separate May 6 suit targeting Colorado’s high-capacity magazine ban, signaling a coordinated legal campaign rather than isolated disputes.

Supporters such as the NRA-ILA portray the Denver lawsuit as a warning to “anti-gun municipalities” that federal enforcement has changed direction. The key legal bet is that post-2008 and post-2022 Supreme Court decisions give governments less flexibility to justify modern restrictions unless they can show a strong historical tradition of similar regulation. Denver’s ordinance predates those rulings, but the lawsuit argues its age does not immunize it from constitutional review.

Why “Common Use” and “Bruen” Make This a High-Stakes Test Case

DOJ and allied gun-rights advocates emphasize that AR-15-style rifles are owned by millions of Americans, with estimates in reporting ranging from roughly 16 million to “tens of millions.” That matters because the legal framework highlighted in the suit turns on whether the banned firearms are widely possessed for lawful purposes. If a court agrees these rifles qualify as “common use,” Denver’s categorical ban becomes harder to defend.

Denver’s defense will likely focus on the city’s responsibility to protect public safety and on arguments that the banned features or models fall outside protected conduct. The public record summarized in current reporting does not yet include a court ruling, any injunction, or detailed judicial findings. For now, what’s most concrete is the political and legal trajectory: a Republican-led federal government is pressing a national standard for gun rights, while a major Democratic city is betting the courts will still allow stricter local rules.