The problem is, this looks so much like a rerun of post WW1 America.
Tariffs (check - Smoot Hawley), American isolationism (check - America First), I guess we won't be far from the economic crisis (not checked yet - Great Depression).
At best, the US will slowly turn into Qing China. Unrivalled in its sphere of influence, stagnant and complacent. The US has always had a very strong anti-scientific undercurrent and a lot of it was kept in check by importing foreign elites wholesale (fairly sure the US public school system up to university level is nothing to write home about, on average). If the US turns against foreigners, most of the good ones will stop coming.
Tariffs (check - Smoot Hawley), American isolationism (check - America First), I guess we won't be far from the economic crisis (not checked yet - Great Depression).
At best, the US will slowly turn into Qing China. Unrivalled in its sphere of influence, stagnant and complacent. The US has always had a very strong anti-scientific undercurrent and a lot of it was kept in check by importing foreign elites wholesale (fairly sure the US public school system up to university level is nothing to write home about, on average). If the US turns against foreigners, most of the good ones will stop coming.