If there isn't enough of a profit you can't force one to comply and that's what I hearing for the non-US interest in running the ports.

And if we ban foreign companies from operating our ports we could be restricted from operating in their ports.

Right now the US Coast Guard inspects overseas ports so the cargo is addressed before it ever reaches US ports. Stop foreign countries from operating US ports and we will likely create problems for ourselves with overseas ports.

DP World currently operates in 13 countries including Germany, South Korea and Australia for a few.

Dubai has been servicing our Navy fleet since the first Gulf War and we haven't had a problem with them.

I think this is a sad view most (polls) Americans are taking toward DP World operations.