Not economically viable. Input costs are too high, especially wages and construction costs.<p>There's a reason why American companies turned to off-shoring with its lower costs several decades ago.
American products are the Best. The rules of economics don't make sense when you want to proliferate the Best. For example, the Fisher Space Pen should be in every school bag of swag.
Last time America was a Manufacturing Superpower, it involved everyone else bombing themselves to rubble (some places even twice); let's avoid that path this time?