The chart they put doesn't prove a point since the difference between today and the last elections in the US can't be appreciated (aside from the fact that in the entire period the drop is caused by automation too). Additionally you have to account for the time it takes to move production from a country to another.

This is not to say that just setting random tariffs to punish other countries is an effective strategy, but I do think that targeted limitation of imports are necessary in a society that is becoming extremely materialistic. My bet is that France's surcharge on Shein products will be the first of many