Civil Rights Groups and Denver Sue to Block Armed ICE Officers From Polling Places

A Civil War-era federal statute, 18 U.S.C. § 592, strictly prohibits the deployment of armed federal personnel to any location where a general or special election is being held, unless their presence is required to repel armed enemies of the United States.

That 150-year-old constraint is now the foundation of a preemptive federal lawsuit filed Thursday in Washington, D.C., seeking to block the Trump administration from sending Immigration and Customs Enforcement (ICE) agents to polling places during the 2026 midterm elections. The legal challenge tests whether the executive branch's immigration enforcement mandate can override a statutory ban on federal troops at the ballot box.[2][3]

The lawsuit was filed by the city of Denver alongside a coalition of civil rights organizations, including the League of United Latin American Citizens (LULAC), Common Cause—which represents nearly 1 million members—and UnidosUS, which operates more than 300 affiliates nationwide.

Represented by the legal group Democracy Forward, the plaintiffs are asking a federal judge to declare any deployment of armed agents to polling sites unlawful and to issue an injunction prohibiting federal officers from carrying weapons near voting locations. The filing comes just eight days before in-person early voting is scheduled to begin in several states, and 54 days before the November 3, 2026, midterms.[2][3][4]

The litigation responds directly to statements made by Homeland Security Secretary Markwayne Mullin on September 1, 2026. During a press conference in New York City, Mullin stated that while ICE agents would not routinely patrol polling places, they could be dispatched to voting sites under specific conditions.

"The only reason why we would be at polling places is if there is a threat to that polling place, or we're serving a warrant," Mullin said. He added that if agents are actively tracking a suspect with an outstanding warrant, "we will be where we need to be."[3][4]

Plaintiffs argue that Mullin's stated policy violates the longstanding federal prohibition and functions as a mechanism for voter intimidation. "Sending armed ICE officers to polling places is not immigration enforcement — it is voter suppression, plain and simple," said UnidosUS President and CEO Janet Murguía in a statement accompanying the filing. The complaint asserts that the mere prospect of encountering armed federal law enforcement at a polling location places voters in fear and threatens the freedom of the upcoming election.[2][3]

The Department of Homeland Security and ICE, along with Mullin and ICE acting director David Venturella, are named as defendants in the suit. DHS has previously maintained in media statements that it is not planning operations targeting polling locations, but has reiterated that arrests could occur if an active public safety threat arises. The administration has characterized concerns over widespread agent deployments as fearmongering, while simultaneously declining to categorically rule out the presence of ICE personnel at election sites.[3][4]

The legal dispute emerges against a backdrop of heightened focus on election security and noncitizen voting by the Trump administration. In April 2026, President Donald Trump signed an executive order titled "Ensuring Citizenship Verification and Integrity in Federal Elections," aimed at creating lists of eligible U.S. citizens.

While federal courts have largely rejected previous attempts to block the administration's overhaul of mail-in voting on the grounds that those challenges were premature, the plaintiffs in this case argue that Mullin's September 1 comments constitute a confirmed policy that warrants immediate judicial intervention.[4]

Local officials have grown increasingly alarmed by the prospect of federal agents at the polls. Denver Clerk and Recorder Paul López stated that the city would protect its elections from "any and all attempts at federal intimidation and intrusion." The lawsuit notes that earlier in 2026, ICE agents conducted enforcement actions at active polling sites in Texas and New York, and that the Department of Justice recently removed longstanding guidance detailing restrictions on federal law enforcement activity at election locations.[2]

The federal district court in Washington will now hear arguments on the injunction request as early voting begins. A ruling will establish the immediate operational boundaries for federal law enforcement during the November 3, 2026, midterm elections, dictating exactly where ICE agents can execute warrants in the final weeks of the campaign.[2][3]