Which, can't be done overnight nor with the rules and regulations we have. For example, if a company wanted to make cell phones in the US, she would still need to get various chips from overseas because using nickel and cadmium in manufacturing is highly restricted in the US (in some cases banned). During the time the US company builds itself to take the place of the foreign company, you would have years of doubling the prices of the products consumers buy. You would essentially shut down much US commerce. Even after a company can form itself, it still would have much higher expenses from the aforementioned chips it can't source domestically.
Now repeat this same issue across all manufacturing types and you see basically economic suicide.
Well.
We’re already committing economic suicide.
So why not a method, which will eventually improve our nation?