Why do the USA lack manufacturing capabilities for PEVs?

This is an exciting time for the PEV community with so many awesome products hitting the market. It’s just very unfortunate that most of the coveted PEV technology is often not readily accessible and often time has no market in the USA. Take for instance the Hunter Quad, the Fiido, or the Weped Cyberfold. If you are a PEV enthusiasts like myself, you probably often wonder why such technology is not available in the USA. Why do you think the USA lacks this ability to manufacture such products?