if this Trump do this tariff often but doesn't really goes thru it or hurt itself company bottomline.

who in the world especially those USA company going to do business in the future?

China are everywhere, they just use proxy countries or company.
The US companies sure not going to be patriot and not doing the biz with china in any way or form.

Only after they got caught, then only act pikachu dunno and blame it all on China hiding it