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.