Good post, but I don't believe the analysis is correct.  There are perhaps 1000 jobs at stake, and with each job yielding 100 cars per year that's about 100,000 cars annually.  There are millions of working poor in America, having no car, or buying a used car, or a low-cost new car.  With the Cruze plant located in the USA 100,000 new Cruze cars  will sell at a higher price.  To keep them competitive, Trump will  introduce his 30% China tariff, and other tariffs, and the net effect is some jobs saved, against higher prices for many goods.  Having to spend more for less goods is going to reduce overall demand, affecting demand in the US and around the world.  Globalization is not easy to unravel.
In summary, you're saving comparatively few jobs and increasing price pressure tremendously.