I think you're wrong about that just based on my own experience. A day's excursion to Tijuana, Mexico will show you. 

The same products, using the same tooling are manufactured there and other places and imported back to the US. Why is automation not affecting Mexico and China according to your theory on job losses? Why did Daikin of Japan put their massive facility in Texas as opposed to Mexico?  Think maybe they saw the writing on the wall?

I had a customer that was specifically in the industrial automation business and there are limits to what you can do with automation. It's great at punching out little metal widgets and cans, but not too good at assembling electrical products with about 50 different controls that have to work in sync. You still need a great deal of overseeing and human intelligence in most manufacturing process. 

Trump is saying the export of the industrial base of the USA is kaput whether the rest of the world likes it or not.