Overall, tariffs would be bad because they would increase the cost of almost everything and cause a trade war.  In the long run, there could be a benefit, because it might make it worthwhile to produce more here instead of buying everything abroad.  This would make us less dependent on all of the enemies we are making.  Right now, if a war starts with China, they can cut us off from high tech microchips and drugs or the components needed to make drugs, especially antibiotics.  We would be seriously hurting.