What are likely the three main goals of President Trump's trade tariffs

 In summary (in no particular order):

1. Opening up global foreign trade to more free trade again
2. Extra government revenue to pay down in the meantime unsustainable government debt
3. Extra government revenues to implement a tax reform to lower taxes on businesses and individuals.

President Trump is a mover and shaker hopefully in the sense of restoring more classical liberalism and the chief business of the American people is business.

America first again. Make America great again. Since 1945, the US has heavily supported Western allies and other allies in the Cold War and beyond. It is high time for the US to cut cords and require its allies to stand up on their own.