The US certainly can't make everything it needs or uses, but the are certain industries where it is critical that we maintain a strong position. The Auto Industry is one of those. The EV subsidies have been met with sharp criticism, but the reality is if our domestic producers don't figure how to make and sell these cars someone else will, and that someone else is China.
This chart of motor vehicle production from Info Graphics Insights sets the situation clear:
http://www.infographicsinsights.com/sea ... %20numbers