Lincoln and Wilson remain the worst presidents in US history. The recent evil bastards have been comparatively so incompetent that their evil is more blatant, but they by no means have a monopoly on evil, or even claim to a greater share of it than Lincoln, Wilson, FDR or Truman.

Carter made a decision to starve an unknowable number of Russian civilians (not Communists, just people) and at the same time gutted the American agriculture industry by cutting them off from one of their biggest markets. And he did it deliberately.