Explain Like I'm Five

The exporting country doesn't charge more, the increase comes from the duty charged as it lands in the target country. So unless the exporting country drops its price to compensate (which often can't happen at the margins commodities use) then it raises the price locally to pay for the tariffs. If there is a local source, that source can sell anywhere between their usual price and the new price level of the foreign product. Usually what those companies do is just raise their prices to almost the level of the tariffed goods, causing inflation, which again the consumer pays.

The theory is that it gives an incentive to invest in production facilities locally, but what this wingnut has done is change the policies an uncountable number of times and scared the hell out of anyone putting money into factory expansion, because they have no idea what grenade he's going to toss into the foxhole next. Cap that off with firing the trusted sources of information in the administration so nobody knows what's true and what's propaganda, and you have a recipe for stagflation.

It's going to be grim unless he has a heart attack or otherwise mysteriously croaks, because it doesn't look like Americans are smart enough to run him out on a rail, despite his obvious pedo issues.

Good luck!