International Longshoremen’s Association locals along the U.S. Atlantic and Gulf coasts are calling for a shutdown of ports and a march on Washington next week.

ILA, which represents labour for port terminals from Portland, Maine, to Galveston, Texas, said it anticipates the Washington protest bringing “much of America’s port economy to a halt.”

The daylong protest in Washington — the date is yet to be announced — is intended to highlight hiring practices in some U.S. ports aimed at reducing the number of dockworkers, and to call for the elimination of the Waterfront Commission of New York Harbor.