So if the TPP were kept intact, but labor/environment protection added, you would support it.
As I've mentioned a few times in this thread, my own attitude is that the TPP was a flawed piece of work, but I've carefully listened to critics of it and I always come away with a weird sense that people are opposing the TPP without even wanting to know what its provisions are: "Anti-capitalist ideology says that trade is bad, so trade treaties are bad, and so the TPP must be opposed." It's a kind of dogmatic and ideological thinking that valorizes pure ideology over real-world action.
I get that you want to raise labor standards worldwide and to be helpful to the poor in other nations, but global trade has vastly improved the lives of the poorest global citizens in the past hundred years. The Pacific Rim nations have all seen immense economic growth, and I would like to see the United States engage with its trade partners even more.
Sometimes, I think that the mistake was to have the negotiators work in secret for years. It invited all kinds of conspiracy-theory thinking, and by the time that the TPP details were ready to be made public, there was already a gigantic wall of discourse built up against it, mostly made up of anti-capitalist cliches.