DOJ sues Denver to block unconstitutional curb on federal agents

Associate Attorney General Stanley E. Woodward Jr. drew the constitutional line as the Justice Department announced its complaint. “Under the U.S. Constitution, the Supremacy Clause makes clear that states and localities do not have the authority to regulate the Federal Government,” Woodward said. “And they certainly cannot enact laws that place the safety of federal law enforcement at risk and undermine federal operations. We will never tolerate the doxxing or harassment of federal officers, or any law like those in Denver that enable violent behavior against federal law enforcement officers and their families.”

On Thursday, October 8, 2026, the department filed suit in the U.S. District Court for the District of Colorado, Civil Action No. 1:26-cv-5063, against the City and County of Denver, Mayor Michael C. Johnston, City Attorney Michiko Ando Brown, and Police Chief Ronald Thomas. The filing challenges Denver City Council Bill No. 26-0125, Ordinance No. 125-26, signed by Johnston on March 3, 2026 after unanimous council approval. Codified at D.R.M.C. §§ 28-300–28-303, the ordinance bans facial coverings for law enforcement during arrests and detentions and requires visible identification or identification upon request for non-uniformed officers. Under D.R.M.C. § 1-13(a)-(b), violators face criminal penalties of up to 300 days in jail and a $999 fine.

Assistant Attorney General Brett A. Shumate of the Civil Division stated the core objection in equally direct terms. “The Denver masking and identification ordinance directly regulates federal law enforcement operations and threatens severe consequences for officers and public safety alike,” Shumate said. “The Federal Government gets to decide which equipment federal officers may or may not wear when performing their official duties.”

The Supremacy Clause, U.S. Const. art. VI, cl. 2, establishes that the Constitution and federal laws are the supreme law of the land, notwithstanding contrary state or local measures. The complaint relies on United States v. Washington, 596 U.S. 832, 838-39 (2022), for the settled rule that a state or local enactment is invalid when it regulates the United States directly. Denver’s ordinance, the department argues, does precisely that by dictating how federal officers—including agents of Immigration and Customs Enforcement and other components of the Department of Homeland Security and the Department of Justice—may shield their identities and present themselves while executing official duties inside the city.

Courts have already stopped functionally identical local rules. The complaint cites United States v. California, 173 F.4th 1060 (9th Cir. 2026); United States v. New York in the Northern District of New York on August 3, 2026; United States v. Virginia in the Eastern District of Virginia on August 18, 2026, now on appeal to the Fourth Circuit; and United States v. City of Philadelphia in the Eastern District of Pennsylvania on July 2, 2026. The Civil Division has brought parallel suits in Maryland, New York, Virginia, Connecticut, New Jersey, California, Philadelphia, and Milwaukee. Attorney General Blanche has directed the division to identify state and local laws and practices that impede lawful federal operations. The Denver case is the latest in that line.

Denver’s answer, given once and in its own words, is transparency. Johnston spokesperson Jon Ewing told Axios: “Denverites deserve to know who is arresting them and what they’re being arrested for.” The city is standing by the ordinance as an accountability measure and plans to defend it. The ordinance applies on its face to all law enforcement, not solely federal officers, though the department alleges it was intended to target federal agents. That is the opposing case as the record states it.

It does not resolve the constitutional defect. A locality may set rules for its own police. It may not criminalize the protective equipment and identification practices of federal officers enforcing federal statutes. When a city ordinance threatens jail and fines for an officer who covers his face during an arrest or detention, the city is not merely requesting courtesy. It is inserting municipal criminal process into a federal operation. Woodward’s statement links such laws to doxxing, harassment, and violence against officers and their families. Shumate’s statement places the equipment decision where the Constitution puts it: with the federal government. Forced visibility that exposes agents to retaliation chills enforcement and compromises sensitive work. Public safety and the reliability of federal law both suffer when cities can rewrite those terms.

The dispute sits inside a longer record of friction over immigration enforcement in Denver. The Justice Department sued Denver and Colorado last year over policies limiting cooperation with ICE. In February, Johnston largely barred ICE agents from city property. Last month, Denver filed suit to block ICE from polling places. The mask and identification ordinance is another local instrument aimed at shaping how federal agents operate inside city limits. National sovereignty and control of the border rest on the federal government’s ability to execute the immigration laws Congress has written. A patchwork of city criminal codes that punish standard protective measures undercuts that authority and the taxpayers who fund the officers who carry it out.

Limited government runs in both directions. Cities retain broad authority over local affairs and their own forces. They do not hold a veto over how the United States equips and identifies its agents when those agents are performing official duties. The rule of law depends on that hierarchy remaining clear. Ordinary Americans who expect federal statutes on immigration and related crimes to be enforced have a concrete interest in officers who can work without facing municipal prosecution for following federal operational practice.