Wilson - gave us the Federal Reserve and presided over the implementation of the Income Tax
F. D. Roosevelt - Subjugated the USSC and gave us the Welfare State.
Johnson - Expanded the Welfare State to ludicrous proportions
Carter - Gave fundamentalist Islam a foothold in Iran from which to launch world wide terrorism.
Obama - Obama's legacy of evil is hard to judge because it is yet to reveal itself but as I see it: Obama gave fundamentalist Islam the opportunity to spread throughout the world by means of migration/refugee flight. Presided over the government takeover of on third of the national economy by imposing socialized healthcare.