1) The point of tariffs is to force people to buy local production, by making alternatives more expensive. If people are willing to pay more to buy Made in US, you don't need them.

2) The source for that number shows that reshoring has been steadily increasing for years [1]. So why the need for tariffs now? Hell, seems like you'd just want to keep up the previous administration's polices - clearly they're working.

[1] http://reshorenow.org/blog/reshoring-initiative-2017-data-re...