Opponents of the administration’s proposed triumphal arch in Washington have asked a federal judge to halt construction before a planned November 5 start date, escalating what is quickly becoming one of the more closely watched public-law and land-use disputes of the season. The requested emergency injunction puts the court on a fast timeline to decide whether the project can move forward while the underlying litigation remains pending.

The dispute centers on a high-profile federal project tied to East Potomac Park and raises familiar but consequential questions about agency authority, project approvals, and the procedural steps required before construction begins.