The US is in negotiations with countries in the Trans-Pacific Partnership. Much of the negotiations are being held hind closed doors. Thing is before any treaty is ratified by the US government it has to be approved by congress, and anything that goes before congress is public record and we will be able to see it. Congress, is not going to pass any treaty which gives up US sovereignty or pays out unlimited US tax dollars.
This is the standard grains of truth covered in bullshit to get people upset about something they don't understand.