They don't want to have problems with current US administration and Trump wants factories, so they give him factories.
promises to the president are meaningless. He cant take away their factories or force them to hire people.
And promises like foxconn's frequently turn out to be the most optimistic number they can think up, to drum up good press and subsidies from politicians looking to show results to their voters.
the room. The automation starts as soon as Trump leaves the room after giving himself his little back pat.