In a global economy, the balls your holding are often your own. It's great that manufacturing will be coming back to the US, but are Americans willing to pay 50%-100% more for their electronics? That's what Foxconn said it would cost if a assembly occurred in the US as US wages. Now, if you can believe Trump, they would be slapped with a 35% tariff if it was manufactered outside the US...but Apple and Samsung and the like are not going to be passing on that tariff to the consumer, with an appropriate mark up.
Americans will pay a higher price for moving jobs into the US or pay a higher price (with money going into Federal Government coffers to be spent on wasteful programs) in their attempts to penalize foreign corporations. And the likely outcome of the latter will be retaliatory tariffs on American goods, causing companies in the US who sell to other countries to lose their competitive edge.
All I can say is - be careful how hard you want Trump to squeeze, because you may not know you're the one who's balls he's holding until its too late.