Change shipping to trans shipping which is what happen. A ship that stops in a US port to refuel and does not and is not required to unload its cargo for inspection. It just proceeds on to South America or wherever its going as long as its not going to unload in a US port. Most refuel from a tanker not even close to a dock and can be miles out.
If something good can come from all of this (better port security; more American companies running the terminals) it may be worth all the grief caused.