some companies left china but they just went to other countries instead. like chinese solar and batteries, you can't just tariff china on those things as the other gooks will pick up slack. certain electronics where under tariffs but companies just moved to vietnam and taiwan.  the only way tariffs work is if it's a blanket tariff from any country for a class of goods.  tariffs for just china makes things more expensive with no homeland investment in return.
United States