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).

CENTERFORSECURITYPOLICY: Freedom Flame 2013

Until there's a law, Addax cannot build the pipeline that would probably move oil to the Turkish port of Ceyhan.

FORBES: Magazine Article

This free-for-all is almost as alien to the better educated, more law-abiding, Sunni citizens of Taiz, the most urbanised region in the north, or Hodeida, its main port, as it is to the southerners.

ECONOMIST: Yemen