Tariffs applied only to things we were producing ourselves. NOT to things we were NOT, and could not be, producing. Read your history books.
Now, as to your "slave labor" canard. Every person who works on the Apple assembly lines is a person who stood in line to apply for the job and was selected out of thousands who applied. They are paid wages that are seven times the countries minimum wage. . . and THREE times the standard wage for people working on non-Apple products. They are there by choice. They are not SLAVES.
Apple is doing everything it can to stop the use of what are termed "Conflict Minerals" that are associated with slave and child labor, most of which comes out of Muslim Africa, and use only certified raw materials. This is an almost intractable problem for some metals, as one ingot may be indistinguishable from another after smelting and the end buyers are at the mercy of the ethical behavior the upline. Apple has staff whose only duty is to follow the trail upline and change unethical practices when they find them. As far as i know, no other company is doing this.
Even if manufacturing were brought back to the US, these problems would persist.
So you are of the opinion that the country that can put a man on the moon can not, could not produce an i-phone when Apple is an American company. Wow you Free Traitors are humorous lot.
Please, to stop the hypocrisy, go on record as saying nothing should be made in the USA. Taken to it's logical conclusion the snake oil you are peddling comes down to. The drain of the wealth creation in this country must stop. Even though the dividends may go down a tenth.