Not to get your hopes up, but Apple is simply looking at the possibilities of moving, not actually planning a move. So, it's entirely possible that Apple will not move to the United States.

Also, there's really no economic benefits of Apple moving to the United States. Obviously, there's the wage issues. In China, a worker is paid $30 a day to build an iPhone. In the United States, it's about $12 per hour. That means, in an average work day, which is 8 hours, it would cost $96. Three times what it costs in China. This does not mean the cost of the iPhone will not go up, as Apple is already charging the maximum amount a customer would pay for an iPhone. However, it would mean it would hurt the revenues of Apple. This means that Apple, unless it has some benefits like tax subsidies, won't move manufacturing back to America.

Also, the manufacturing itself is a small scale operation. In the process of building an iPhone, most of the work comes from designing in California, and building components from factories in United States, South Korea and Japan. Factories in China are simply putting the parts into place, like building a Lego set. So even if Apple were to bring manufacturing back into the US, it would employ a small number of people.

Furthermore, Apple is already using robots to replace half of the Chinese workers in China. Soon, it is possible most of the work in manufacturing an iPhone will be given to robots. So, if Apple were to relocate manufacturing back to the US, not many people will be hired because of robotics and automation. I think Adidas relocated their factory back to Germany from China because they automated their manufacturing process.

Also, the factory won't be located in Rust Belt states, where the demand for manufacturing jobs are high. It will be probably be located in California, close to their HQ and Pacific ports, since a large part of their market is in Asia.

As for the threat of tariffs on goods manufactured in China, they will simply move operations to Vietnam, or any other Asian countries that will have large manpower with low wages. If Trump wants to put high tariffs on every goods that are not manufactured in the United States, that's an economic suicide for him.

In conclusion, the manufacturing jobs will never return to the United States unless it is automated. This isn't the 1950s anymore, where a person can graduate from high school, work in a factory, join a union and receive enough wages to enjoy a middle class lifestyle. The factories of the 21st Century will be automated, and hire small number of college graduates who can repair the sophisticated robots, program them, and manage the automated manufacturing process.

If you want to hold Apple accountable, get them to pay back the backed up taxes from foreign accounts they have overseas. Then close those loopholes so they can't evade taxes.

My advice to all of you is stop hoping that manufacturing jobs will return like they were in the fifties. If you want to work in factories again, go to college and get degrees in computer science, robotics, or engineering.