Grizzly responded to you that we should use economy, foreign policy, and domestic policy as a yardstick instead of 'morality.' I don't see how that is any more objective. What makes a 'good' economy, or a 'bad' foreign policy? However we choose to measure the value of American presidents, it will be morally subjective, and it will be according to modern moral standards.

I would say judge on the results of the economic and foriegn policy actions taken by the president, you can see which presidents did well for the economy and you can see what results came from thier foriegn policy actions and whether this benefitted america.