The offshoring of American manufacturing did not happen overnight, nor will the on-shoring (if it ever eventuates in its entirety).  Further, even if products are made in America, the consumer better quickly get used to paying more, since the cost of doing so exceeds what it costs to manufacture overseas and import.

The only way to undercut overseas manufacturing in a meaningful way is mass automation which...oops...kills American jobs and takes people out of the workforce. Thus creating an economic knock-on effect and reducing the ability of the average consumer to spend money.

Viewing tariffs as the solution is an overly simplistic approach that ultimately benefits no one. However, the American consumer is about to learn that the hard way. Further, there is far more of "the rest of the world" than there is of America and taking this approach risks making the US a pariah in the global trade market, even if it does manage to find some kind of economic equilibrium in the four years ahead.  

There are painful economic times ahead for everyone, but, if the rest of the world decides that it isn't worth it to trade with America, this risks creating a vacuum that other countries with influence are more than happy to step in to fill.