Outside regulation of a nation's economy and trade are incompatible with self-government.
Our "free trade" agreements reduce our ability to make decisions as a people. What is more important to us? Cheap stuff from China? Cheap services from India? Or self-government.
"Free trade" is not compatible with our Constitution's grant to the Congress of the authority to regulate commerce and to control our money supply.
US Constitution -- Article I, Section 8
The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;
To borrow money on the credit of the United States;
To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes;
http://www.usconstitution.net/const.html#A1Sec1People argue that Congress thus has the authority to enter into trade agreements, and that is true.
But, with authority goes responsibility.
Congress may have the authority to abdicate its responsibility for regulating our trade and commerce. But does it have the right to abandon the legitimate interests of our democracy and national sovereignty under the cover of the Commerce clause?
I think that if Congress exercises its authority under the Commerce clause in a manner that threatens other provisions of the Constitution -- such as Congress's power to control the money supply of our country, to determine taxes, duties and imports -- then Congress's actions are unconstitutional.
Of course, we are not Greece -- not yet. But the fate of Greece will be ours if we continue to participate in our current "free trade" agreements.
Read the Shock Doctrine.