Entering the home stretch of the 2024 presidential race, former President Donald Trump is doubling down on his pledge to institute big, new tariffs if voters put him back in the White House. Recently, Trump has promised to slap 200% tariffs on tractor-maker John Deere if it manufactures in Mexico; previous commitments include slapping 60% tariffs on goods imported from China and levying tariffs of "10 percent to 20 percent… on imports from other countries." For its part, the Biden-Harris administration has kept tariffs instituted under Trump in place (so much for political "contrasts") and…