The TPP is an absolutely massive document, because there are so many countries involved. I used to work with the US - Canada Free Trade Agreement, and then with NAFTA, and they were very simple in comparison. I glanced at the US Trade Representative's summary of the TPP, here: https://ustr.gov/about-us/policy-offices/press-office/press-releases/2015/october/summary-trans-pacific-partnership
but it just summarizes the chapters, many of which, I think, are hundreds of pages long. There are copies of the agreement also available on the internet, but good luck trying to read them. Very complex.
You need to find a summary done by a group you trust, even if it will be biased.
When I hear Trump talk about what a bad agreement NAFTA is my jaw just drops. First of all, the reason why the US-Canada agreement was expanded by NAFTA was to help out Mexico to staunch the flow of Mexican immigrants into the US. Without that agreement and the thousands of jobs it has created in Mexico, think how many more people would be fleeing Mexico. You can't stop economic refugees or those fleeing war zones. Why did North America fill up with Europeans? Why can't Europe stop Syrian, Iraqi and Afghani refugees, or those coming from Africa?
Secondly, we here in Canada certainly think the US gained enormously from NAFTA. What a re-negotiated NAFTA would look like, one more advantageous to the USA, boggles the imagination. One of the worst parts of it, imo, is the fact it gives corporations the right to sue governments if they think laws have been geared against them. From what I have heard of Trump speeches, it seems to me that I keep hearing them say that the TPP grants foreign governments the right to sue the US. That is absolutely false.
And guess what? Which country's corporations have been suing governments left, right and centre, and winning hundreds of millions? US based corporations have issued hundreds of lawsuits under the NAFTA provisions. I don't think Canadian and Mexican companies have the aggressive tendencies or experience to sue with the same viciousness Americans sue with. My prediction is that if TPP is passed there will be a whole new cornucopia opening up for US trade litigators.
I'm not crazy about pipelines, but Trans Canada Pipeline has filed a multi-billion dollar lawsuit against the US government under NAFTA for disallowing the Keystone XL pipeline that looks like it has a pretty darn good chance of succeeding (considering how many tens of thousands, or hundreds of thousand, of miles of pipeline have been given approval to US companies during the same time period).