Mt. Rushmore: Three surveyors and some other guy.
Life goes on within you and without you. -Harrison
Hear the echoes of the centuries, Power isn't all that money buys. -Peart
After you learn quantum mechanics you're never really the same again. -Weinberg
His signature legislative effort: healthcare. The economy won't necessarily stick to him as it had started before his Presidency, and while the deficit became a serious issue for the midterms in the previous term, it wasn't as damaging as the healthcare discussion. His chief legislative effort, will perhaps ultimately be a key, if not the component to his short-term and mid-term legacy. If it continues to have problems down the road in terms of public acceptance, implementation, and effects, then this will potentially harm his legacy the most. This was where he put most of his political capital during the first term.
"No religion is true, but some religion, any religion, is politically necessary. Law and morality are insufficient for the large majority of men. Obedience to the law and to the morals are insufficient for making men happy. […]Law and morality are therefore in need of being supplemented by divine rewards and punishments."
His greatest weakness is the existence of the senate.