The protection of the ports under homeland security is now running against the protection of the homeland economy...
The massive US deficits that foreigners have been financing for many years are only now coming home to roost...after many years. Now foreigners are no longer content merely holding US Bonds...they want assets! Real Assets...and not just trophy real estate anymore.
Foreign holders of US debt now want US companies and their international brands...
IBM has already sold it's computer business... And a lot of other companies have divested brands and factories to foreign money.
Yet, China was recently denied the purchase of a US oil company. And now there is the ports flap with the UAE. And, close on the horizon even more "security" issues, as defense contractor suppliers are being sold to "The Arabs."
Amazingly, the US economy may get to protectionism...through the homeland security issue...not thorough the macro-economics of the unsustainable debt-based American Economy.