Over 60% of Apple's sales are outside the United States, which levies corporation tax on total world wide sales, and that rate is around 40% according to the CEO, 35% fed and 5% state, more or less. Apple contracts out the manufacturing but keeps the programming jobs in the United States, plus spends over 12 Billion USD on R&D, pays dividends to its shareholders which generates income tax to the U.S., and is building a massive circular head office in California. This business model is not a manufacturing business, but it does generate high end jobs in the United States, plus retail jobs as well, but the U.S. benefits mightily from the overseas sales which support the infrastructure in the United States, and the high U.S. corporate income tax. It depends too on companies such as Qualcomm and Samsung for parts, etc. but it also earns patents on its own. So how can Mr. Trump bring the jobs back to the U.S. when most of them are already there?