A lot of people praise this from across the aisles but Free Trade agreements get a ridiculously bad rep. People get hung up on theoretical courts between corporations and countries as well copyright law, thats important to vocalize but the real utilization is duty mitigation. It allows US companies to sell to customers over seas with ease, which promotes production in our own borders. Axing free trade just ends up hurting the complex manufacturing that still remains in the US and benefits from Free Trade, like chemical production.
A lot of US manufacturing companies in the United States rely on NAFTA and were looking forward to the TPP in order to sell their products to countries besides ourselves. We can obviously still do that, but customers in those countries will look elsewhere to avoid the duty. For example, Japan brings in a ton of raw materials from my company and the TPP would have encouraged us to continue that production in the states. It will be easier to do so in south east asia now.
Im not an economist but I was a Free Trade Analyst for a decent while, so Im not talking 100% out of my ass.
I would have been completely fine with reworking the agreement, but cutting it down completely seems like a poor choice.