A local canoeing association filed a lawsuit on Thursday to ensure access to a section of the Potomac River that abuts a Trump golf course where the president plays frequently.
The Canoe Cruisers Association of Greater Washington DC lodged the complaint against the Department of Homeland Security and Coast Guard with a US District Court in Maryland.
The Trump National Golf Club is located on the banks of the Potomac River in Sterling, Virginia, across from two sites popular with canoers and kayakers on the Maryland side of the waterway.
Canoe Cruisers is objecting to a rule imposed last year by the Department of Homeland Security and the Coast Guard declaring a two-mile (3.2-kilometre) stretch of the river a "permanent security zone."
The lawsuit claims the move "revokes the public's legal right to access and enjoy a popular section of the Potomac River whenever President Trump visits Trump National."