The District of Columbia and Virginia sued the Trump administration on Saturday, October 31, to block construction of a 250 foot triumphal arch at Memorial Circle, arguing the project needs an act of Congress and breaks federal height and review laws.

D.C. Attorney General Brian Schwalb and Virginia Attorney General Jay Jones filed the 46 page complaint in the U.S. District Court for the District of Columbia against the National Park Service and the Interior Department, FOX 5 DC reported. Memorial Circle is the traffic circle at the Virginia end of Arlington Memorial Bridge, across the Potomac from the Lincoln Memorial and at the entrance to Arlington National Cemetery.

"The construction of the Arch will inflict immediate and irreparable harm on the District and Virginia," the complaint says, according to NBC News. Jones called the project "President Trump's illegal vanity project" and "an affront to this hallowed ground." White House spokesperson David Ingle did not address the suit directly and said the arch "is going to be one of the most iconic landmarks."

The four legal claims

NBC reported that the complaint rests on four federal statutes. Our plain language summary of each:

The Commemorative Works Act. The statute says commemorative works on covered federal land in the capital area "may be established" only "as specifically authorized by law." The states say Congress never passed such a law for the arch.

The Height of Buildings Act. The states argue the arch exceeds the 130 foot limit that governs construction in the District.

The National Environmental Policy Act. The complaint warns of stormwater runoff into the Potomac and lost habitat for two endangered bat species, according to FOX 5, and argues the required environmental review was skipped.

The National Historic Preservation Act. The states say the arch would block the sightline between the Lincoln Memorial and Arlington House.

The suit also leans on practical harm. It says construction would close parts of Memorial Circle and cut Memorial Bridge to two westbound lanes for two to three years, and that the arch and 320 foot construction cranes would sit near the approach path to Reagan National Airport. CBS News has reported that the Federal Aviation Administration found the arch would not be a hazard to flights, so that claim is likely to be contested.

Our arithmetic on the height

The arch is designed at 250 feet. The limit the states cite is 130 feet. That is 120 feet over the cap, or about 92 percent taller than the limit, which is why the complaint describes the arch as nearly double the allowed height. The construction cranes the complaint describes, at 320 feet, would stand 190 feet above the same cap, nearly two and a half times the limit, for as long as the work lasts.

One project, three lawsuits

The state suit is the third legal challenge to the arch, and the timing is driven by a planning vote. Our timeline, built from court reporting:

October 15, 2025: President Trump shows reporters a model of the arch in the Oval Office.

February 2026: Three Vietnam veterans and a retired architectural historian, represented in part by Public Citizen Litigation Group, sue in federal court in Washington.

May 21, 2026: The Commission of Fine Arts approves a revised design that keeps the 250 foot height.

Early October 2026: The Arlington County Board sues in the Eastern District of Virginia, the first government to go to court over the arch, WTOP reported.

October 21, 2026: The Park Service tells the court that "construction could commence as early as November 5, 2026," pending final approval from the National Capital Planning Commission.

October 30, 2026: U.S. District Judge Tanya Chutkan hears the veterans' request for a preliminary injunction and does not rule from the bench.

October 31, 2026: D.C. and Virginia file suit.

November 5, 2026: The planning commission meets to review final site and building plans.

What the judge has already signaled

At the October 30 hearing, Chutkan said standing was the most important issue in the veterans' case and questioned what harm the government would suffer from a short delay, "apart from the executive's desire to bedazzle the city," CBS News reported. She also said, "I don't even know who is paying for this thing." The Justice Department argued the case should be dismissed and pointed to sworn declarations from Defense Secretary Pete Hegseth and Homeland Security Secretary Markwayne Mullin describing security uses for the structure.

That is where the state suit may matter most. Standing is the government's best defense against private plaintiffs who object to a view. A state and the District can point to their own roads, bridges, water and emergency routes. D.C. Council Chairman Phil Mendelson, who sits on the planning commission, filed a declaration backing the suit. "It is about following the law and respecting the responsibilities Congress assigned to the Commission," he said.

What comes next

The practical deadline is Thursday. If the commission approves the plans on November 5 and no judge has ruled, work could begin that day. The plaintiffs in all three cases have warned that once building starts, the government will argue that stopping it causes harm of its own.

The arch is not the only fight over the federal landscape in Washington. In a nearby case, a judge has now opened a misconduct inquiry over the East Potomac golf course, after earlier barring more tree cutting there.

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Two Taps News stories summarize reporting and the analysis discussed on Two Taps and Friends. They are not legal advice. Read our standards.