In reality the TPP is all about going after and undermining the rights of labor, while subsidizing and protecting the profits of a global corporate class. The NY Times helps start the discussion on this point ...
An ambitious 12-nation trade accord pushed byPresident Obama would allow foreign corporations to sue the United States government for actions that undermine their investment “expectations” and hurt their business, according to a classified document.
How can the interests of foreign corporations trump U.S. law and state sovereignty, you ask? Very simple. According to Art. VI of the Constitution,
... This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding.
You can read the NY Times piece here. There's a video on the topic here.