You start a trade war with a country they will retaliate by slapping high tariffs on US goods so doing this will not help the US.  It may bring some jobs back, but how many jobs will it cost elsewhere?  Evidence overwhelmingly shows free trade as a whole benefits countries more than it harms.  Yes some individuals may be harmed, but the proper solution is to use the gains to help compensate the losers of free trade since the gains from the winners are far greater so if you do that, it is pareto efficient as they say in economics.