Iin the 1990sPresidential candidates have fought over how open America should be to trade with other countries. Nowadays, the commercial debate revolves around the extent to which America should shut down. Donald Trump is undoubtedly the more radical of the two candidates, with a vision of tariffs that would set back economic strategy by almost a century. Kamala Harris is less extreme but still sees a world in which America is better served by soft protectionism, including subsidies to favored industries.