Of course they will.
Who would like to buy an American car if you got the choice to buy a German one? None.
Because the US cars need a lot of parts from outside US, imported with high tariffs, means high prices.
But probably you will go back to more simple cars.
And enjoy your iPhones. Price will go up to 2000 USD or more, because most parts are coming from China.
And without rare earths you will be degraded to pedestrians because no batteries available anymore, thanks to the wisdom of your POTUS.
But if you're lucky he will be kicked out of Whitehouse early.