Further to this point, what people call "free trade" is in many cases actually not free at all. A good example of this is the bilateral relationship with Thailand, they put tons of tariffs on US imports, and the US puts very few tariffs on Thailand. Why? The rationale for this is ostensibly that the US would like to have more political influence in Southeast Asia, or hasn't totally internalized that the Cold War is over, or something.

(It also so happens that Thailand places very low tariffs on Chinese goods - and their government has been currying political favor with Beijing for a long time - they are happy to enjoy unrestricted access to US markets and seem quite confident that the status quo will endure so if we are trying to buy political influence with them, we seemingly have been so toothless that it isn't even working!)

The US has deals like this all over the planet where it gives other countries unrestricted access to its markets, in return for what is not clear. A lot of these deals contributed to the movement of US manufacturing to places like Thailand, which hit the US working class in the wallet very directly. Sure there are also good deals that we should preserve as-is but it doesn't seem unreasonable at all to me that some of these be subjected to scrutiny and revision.