U.S. ports are pushing back on a new round of proposed tariffs against Chinese goods, amid concerns that tariffs will jeopardize U.S. jobs and will harm U.S. ports’ competitiveness.

“We’ve seen standoffs in international commerce before, and there’s still time to resolve differences, but recent tit-for-tat measures aimed at imports and exports could cause long-term damage and harm American consumers and businesses,” said Mario Cordero, executive director of the Port of Long Beach.