D.C. and Virginia sue to block Trump's 250-foot arch, calling it 'flagrantly unlawful' days before work could start

Washington, D.C., and Virginia sued the Trump administration on Saturday to stop President Donald Trump's planned 250-foot arch at Memorial Circle, near Arlington National Cemetery. Their lawyers call the project "flagrantly unlawful" and want a federal court to halt construction and site preparation before they begin, possibly within days.

It is the first time the two governments have gone to court themselves over the arch, and their involvement may matter more than the headline suggests.

The harm argument the earlier cases struggled with

The Justice Department's main defence so far has been that opponents cannot show they would be personally harmed. It has made that argument against three Vietnam War veterans and a historic preservationist, whose case is before Judge Tanya Chutkan.

D.C. and Virginia say they would suffer direct harm. The complaint argues that construction would snarl traffic, slow emergency services, force both governments to spend public money responding to the work, and damage environmental and historic interests. If a court accepts that, it removes the obstacle the administration has leaned on.

What the complaint says is illegal

The filing has eight counts, including claims under the Administrative Procedure Act, the National Environmental Policy Act and the National Historic Preservation Act. These are the central points:

Claim	What the law says, according to the suit
No approval from Congress	The Commemorative Works Act requires specific authorisation for covered memorials, and another statute bars structures on federal land in the District without express authority
Too tall	The Height of Buildings Act generally limits buildings to 130 feet on a business street or avenue; the arch would be 250 feet
Reviews skipped	Environmental and historic-preservation requirements were not met
Rushed timetable	Officials are pressing ahead before courts can rule

"The court should not allow this cynical gambit to succeed," the lawyers wrote. The defendants are the National Park Service, the Interior Department, Interior Secretary Doug Burgum and Park Service official Jessica Bowron.

D.C. Attorney General Brian Schwalb said the construction "is flagrantly illegal and will cause serious, immediate, and irreparable harm". Virginia Attorney General Jay Jones called it an "illegal vanity project" and "an affront to this hallowed ground". The White House had not commented when the suit was first reported.

What drivers and residents would face

According to material cited in the complaint, the Park Service expects work to last about two to three years and run 20 hours a day. The south side of Memorial Circle would close and westbound traffic from Memorial Bridge would be reduced. For commuters between Virginia and central Washington, that is one of the main crossings of the Potomac.

The plaintiffs also warn of pollution reaching the Potomac and the loss of historic sightlines designed into the capital's layout.

Four cases now stand against the arch

This is now one of several cases against the arch:

• February 2026: three veterans and a preservationist sued, arguing it would intrude on Arlington National Cemetery.
• October 8, 2026: Arlington County sued in the Eastern District of Virginia, the first government to do so, over the environmental review.
• This week: at a hearing in the veterans' case, Judge Chutkan voiced doubts about the government's national security justification and said she may rule before work begins.
• October 31, 2026: D.C. and Virginia filed their suit, asking for both a preliminary and a permanent order against construction.

Chutkan had earlier ordered the Park Service to give two weeks' notice before starting. Earlier filings pointed to November 5 as the start date, so a ruling in at least one of these cases is likely in the coming days.