had to do some research. I’m a million times worse than eve. This was interesting if not partial...
http://query.nytimes.com/gst/abstract.html?res=9C03EFDB1339EF3ABC4952DFBE668389639EDE
otherwise, wikipedia
https://en.wikipedia.org/wiki/Tariffs_in_United_States_history
opinion on history (always interesting)
http://www.cato.org/publications/commentary/truth-about-trade-history
Interesting links. I scanned them, but didn’t see anything specific about what powers the US president has at present to address unfair or illegal trade practices. I believe the president still can take some actions on his own, but probably less than in the past.
Still, I wish I knew authoritatively what power a president has these days to address trade matters. I might try to research it more soon.