The Trump administration is set to begin excavation work within the next fortnight on a site for a proposed 250-foot triumphal arch in Washington, D.C., even as the project faces an active legal challenge. Interior Secretary Doug Burgum announced the start of works on the "Great Triumphal Arch and Military Observation Deck", which would sit on Columbia Island between the Lincoln Memorial and Arlington National Cemetery. The move is significant because opponents argue the administration lacks the necessary congressional authorisation and that the structure would harm historic sight lines in the capital, raising the prospect of a court intervention before or during construction.

Burgum shared mock-ups of a white and gold arch topped with the phrase "ONE NATION UNDER GOD", a winged Lady Liberty-style figure and eagle motifs, describing it as a piece of architecture "befitting the most powerful Capital in the World". Three veterans and an architectural historian, represented by the Public Citizen Litigation Group, are suing over the plan, with attorney Nicolas Sansone warning that construction "cannot and should not proceed apace". A National Park Service report last month supported the arch in principle but acknowledged it would have "direct and indirect adverse effects" on nearby historic sight lines. Burgum defended the scheme by noting Washington is the only major Western capital without an arch, framing it as fulfilling a 125-year-old ambition, and it joins other Trump-era projects including the Kennedy Center renaming, a new White House ballroom and the Lincoln Memorial Reflecting Pool refurbishment.