That means that politics rules ~ it's unlikely a really great beach in New Jersey can be converted into use as a site for port expansion.
“If the government already OWNS the land, it simply cannot be “taken”. That’s because the government does the taking, and the federal government can take state/municipal owned land only with the permission of the state affected.”
I think many, or most ports are owned by states or cities, and those entities would be the ones to expand existing ports or construct new ones, not the feds.
And the need for new ports in this discussion is primarily on the west coast, not New Jersey.