The Trump triumphal arch lawsuit is a federal case brought by three Vietnam War veterans and a retired architectural historian who are asking a judge to block construction of a 250-foot arch the Trump administration wants to build near Arlington National Cemetery. Filed in February 2026 in the U.S. District Court for the District of Columbia, the suit argues the project is moving forward without the congressional authorization that federal law requires for new monuments in Washington. As of late June 2026, both sides have filed for summary judgment and no ruling has been issued.
Who Sued and What They’re Asking the Court to Do
The case is Lemmon v. Trump, Case No. 1:26-cv-00544, assigned to Judge Tanya S. Chutkan. The plaintiffs are Vietnam War veterans Michael Lemmon, Shaun Byrnes, and Jon Gundersen, joined by retired architectural historian Calder Loth. They are represented by the nonprofit Public Citizen Litigation Group.1NPR. Trump Arch Veterans Arlington National Cemetery2CourtListener. Lemmon v. Trump Docket
The complaint asks the court to stop the project on several grounds. It alleges the arch violates the Commemorative Works Act and Title 40 of the U.S. Code because it is proceeding without an act of Congress authorizing it. It also alleges the administration has failed to complete required reviews under the National Environmental Policy Act and the National Historic Preservation Act. The plaintiffs contend the arch would disrupt the historic sightline between the Lincoln Memorial and Arlington House, “dishonor their military and foreign service,” and pose a hazard to air traffic at nearby Reagan National Airport.3NPR. Vietnam Veterans Sue to Block Trump Arch4Jurist. Trump’s Planned Independence Arch Facing Lawsuit
The Arch at the Center of the Case
The proposed structure would stand 166 feet tall at Memorial Circle, a traffic circle on the Virginia side of the Arlington Memorial Bridge between the Lincoln Memorial and Arlington National Cemetery. With a winged angel statue at its peak, the total height would reach 250 feet. Architectural renderings released on April 10, 2026 by the firm Harrison Design show two 24-foot eagles and the inscription “One Nation Under God.” Four golden lions were included in the original design but were later removed at the recommendation of the Commission of Fine Arts. Plans call for an observation deck, informational displays, and possibly a cafe and gift shop.5NBC News. Trump’s 250-Foot Arch Renderings6New York Times. Trump Arch Design Approved7NPR. Trump Arch DC Lincoln
The administration has framed the arch as a marker of the country’s 250th anniversary. White House spokesman Davis Ingle said it would “enhance the visitor experience at Arlington National Cemetery” and serve as “a visual reminder of the noble sacrifices borne by so many American heroes throughout our 250 year history.” Trump has said “triumphal arches are a hallmark of a world-class city” and that Washington was “the only important and major city that doesn’t have one.” In an earlier statement from October 2025, he said the arch was intended to honor “Me.”7NPR. Trump Arch DC Lincoln
The Core Legal Argument: No Act of Congress
The Commemorative Works Act, codified at 40 U.S.C. Chapter 89 and enacted in 1986, requires that new commemorative works on federal land in Washington and its environs be “specifically authorized by law.” Sponsors must be public agencies or tax-exempt nonprofits, and proposals must move through a multi-step review involving the National Capital Memorial Advisory Commission, the Commission of Fine Arts, and the National Capital Planning Commission, along with environmental and historic preservation reviews. Federal law generally prohibits the use of government funds for such memorials, requiring sponsors to raise the money privately.8Office of the Law Revision Counsel. 40 USC Chapter 89: National Capital Memorials and Commemorative Works9BBC. Trump Arch Design Approved by Commission
The plaintiffs’ position is that no such authorization exists for the arch. The administration counters that none is needed, pointing to a 1925 congressional approval for a pair of decorative columns at Memorial Bridge that were never built. Architect David Parker rejected that comparison at an NCPC hearing, saying the 1925 columns were far smaller and less intrusive than a 250-foot arch measuring 170 feet wide and 90 feet deep. NCPC chairman William Scharf, who also serves as White House staff secretary, has argued that the 1910 Height of Buildings Act, which caps most Washington construction at 130 feet, does not apply to federal projects because of sovereign immunity. Trump has said repeatedly he does not intend to seek congressional approval.10The Art Newspaper. Trump Triumphal Arch NCPC Hearing Vote9BBC. Trump Arch Design Approved by Commission
How the Approvals Advanced
The plaintiffs’ claim that the review process was irregular rests on what happened at the reviewing commissions. In October 2025, the administration fired all six sitting members of the Commission of Fine Arts, each a Biden appointee, and said new commissioners would be “aligned with President Trump’s ‘America First’ policies.”11Washington Post. Trump Arts Commission Firings12Commission of Fine Arts. New Members Appointed 202613The Art Newspaper. Trump Ballroom Commissioner Participates in Russian Davos
On May 21, 2026, the newly constituted Commission of Fine Arts granted final design approval, despite what was reported as 99.5% unfavorable public comment. Cook said “Washington is not a static city. It must grow to allow the next 250 years of Americans to celebrate their accomplishments.”6New York Times. Trump Arch Design Approved On June 4, 2026, the National Capital Planning Commission voted 9–1 to advance the project. The sole dissent came from Commissioner Evan Cash, a D.C. City Council member who questioned the absence of congressional authorization and a defined commemorative purpose. Nearly 1,700 public comments were submitted to the NCPC, with the vast majority opposing the project.10The Art Newspaper. Trump Triumphal Arch NCPC Hearing Vote
The National Park Service ran a public comment period for its Section 106 assessment under the National Historic Preservation Act from June 5 to June 15, 2026. An NPS assessment stated that the arch “may result in a direct adverse effect to the Lincoln Memorial as it would change the interrelationships of the existing monumental landscape.”14Senator Jack Reed. Reed Opposes Trump’s Arch
Where the Case Stands Now
The plaintiffs initially sought a preliminary injunction. After a hearing, the government committed to giving at least 14 days’ notice before starting any construction, giving the plaintiffs time to seek an emergency order. Public Citizen then withdrew the motion without prejudice, and Judge Chutkan formally denied it without prejudice on April 8, 2026.15Public Citizen. Lemmon v. Trump
The Department of Justice moved to dismiss on April 28, 2026, arguing the plaintiffs lack legal standing. Public Citizen filed its opposition on May 12. The plaintiffs then moved for summary judgment on May 27, and the government filed a cross-motion for summary judgment on June 17. Judge Chutkan set a briefing schedule requiring the plaintiffs to file a combined reply by July 1, 2026. No ruling on the merits has been issued.16PACER Monitor. Lemmon et al v. Trump et al
Construction has not begun. Preliminary site surveys and testing started in May 2026, and the project’s cost remains undisclosed. The Commemorative Works Act also sets time pressure on projects it covers: legislative authority for a memorial expires seven years after enactment unless a construction permit has been issued and the sponsor has raised at least 75% of the estimated cost. Experts quoted by the BBC said the standard 24-step process typically takes years, making it unlikely the arch could be finished by the administration’s stated July 4, 2027 target.17Spectrum News. Design Plan for Trump’s Proposed Washington Arch Approved9BBC. Trump Arch Design Approved by Commission
Congressional and Veteran Response
On March 9, 2026, a bipartisan group of lawmakers filed an amicus brief in federal court opposing the project. The group included House Ranking Member Jared Huffman, Senator Angus King (an independent from Maine), and Senators Martin Heinrich and Jeff Merkley. Huffman called the arch an “illegal monument scheme” and a “vanity project,” noting that previous major memorials to Lincoln, World War II, and Martin Luther King Jr. had all followed the standard congressional authorization process.18House Natural Resources Committee Democrats. Huffman, King Lead Amicus Brief Opposing Trump’s Illegal Monument Scheme
Senator Jack Reed of Rhode Island called the arch “a violation of federal law, a waste of taxpayer money, and an insult to memory of the men and women of the U.S. military whose final resting place is Arlington National Cemetery.” Reed also alleged the administration planned to divert $15 million from the National Endowment for the Humanities to fund initial construction, and said planning documents showed the administration aimed to finish the arch before the end of Trump’s term using 20-hour-per-day construction shifts.14Senator Jack Reed. Reed Opposes Trump’s Arch
At the NCPC hearing, veteran Stephen Eubank described the arch as a “monumental disgrace” and an “insult to the heroes in the cemetery.” Major veterans’ organizations, though, have largely stayed on the sidelines. The American Legion told NPR it “does not have a position on the issue,” and no public positions have been attributed to the VFW, Vietnam Veterans of America, or the Vietnam Veterans Memorial Fund.1NPR. Trump Arch Veterans Arlington National Cemetery