CNN has an interesting new poll out in which they test the GOP's disingenuous (but Frank Luntz approved) "repeal and replace" slogan against the alternatives of "leaving the bill as it is" and making "additional changes to increase the government's involvement in the nation's health care system."
The results? 50% believe support leaving the bill as it is (23%) or expanding it (27%) while 47% support "repeal and replace."
Keep in mind that CNN didn't just test repeal -- they tested the GOP's preferred formulation, "repeal and replace." Nonetheless, the Republican argument falls short: more people support the Democratic approach (maintain and/or expand) than the GOP's path (repeal and replace).
I'd be willing to wager that 47% will be at or close to the high-water mark for the GOP position. As we move forward and people become more familiar with the law, anyone serious about efforts to improve the new reform legislation will be offering ideas for incremental expansion or change, not full-scale overhaul.
Think about it this way: if we were talking about Social Security or Medicare, how do you think "repeal and replace" would poll? It would poll terribly, because it sounds like a bunch of nonsense. That's the same challenge Republicans will begin to face. They are starting out from behind with a strategy that is destined to fail. It's not an enviable position to be in.