Carter, considering that the other two are among the best Presidents in history.
You're right, Snowstalker, we obviously like LBJ because we love seeing Vietnamese die. There is absolutely no reason for any leftist to like him. But then you hate Bernie Sanders because he doesn't like ISIS, so I imagine in your insane worldview the Great Society and War on Poverty didn't count because they didn't involve guillotining social democrats.
Lives of Vietnamese people and American soldiers>Medicare. Simple as that.