Since the president is reportedly urging member of Congress to "make history," it's worth keeping in mind some polling from history.
According to Gallup in 1965, the year it passed, Medicare had 63-28 support.
Flash forward to 2010, on the eve of potentially "making history," Americans disapprove of the current health-care package 55-35.
These numbers are almost a complete inversion of Medicare's level of support. It's fitting, then, that this current package has as a centerpiece taking the knife to Medicare and cutting hundreds of billions of dollars from it.