He could encourage and sign into law legislation barring foreign ownership or management of U.S. port facilities (akin to the rules governing other critical infrastructure).
Prosecco, produced in Italy's Veneto and Friuli Venezia Giulia wine regions, enjoys legal brand protection under EU rules that govern other wines like Champagne and Port.
In recent weeks French fishermen have blockaded the port of Calais to show what they think of Europe's rules on net sizes, presumably unaware that their own government supported those rules.
Since then, Kenya has experienced a bottleneck at the port of Mombasa for shipments into the country while they are evaluated against existing GM-related rules.
As a result, the Port Authority, which operates JFK airport, has taken a series of measurements and issued new rules about where the A380 can and cannot go.