president Obama has divided the US more than was done by slavery and the Civil War. This time it is not a war, but a political Blue and Red division.
Obamacare didn't improve the Quality of Healthcare, he made it worse by putting tens of million more people into an already pathetic system.
JFK had a goal of putting a man on the Moon, and it happened. Had Obama chose a plan to cure disease, and even if it didn't bear positive results, it would have been a good legacy. As no other president has even tried to do that.