Jonathan Cohn thinks fully repealing the bill is near impossible:
[A]dvocates of repeal have one extra liability that the law's architects did not -- a lack of majority support even before the wrangling begins. As late as July 2009, well into the ugly legislative process, more than 50 percent of survey respondents were telling Gallup that they supported comprehensive health care reform. Previous polls frequently showed support to be even higher. By contrast, repeal starts with less public backing. In most polls, only around 40 percent of respondents say they want to get rid of the health law. And the number falls dramatically when pollsters tell respondents that repeal would mean giving up popular features like guaranteeing coverage for people with pre-existing conditions.
None of this means the Affordable Care Act is safe. Partial repeal strategies, like withholding the funds to implement the law, seem quite plausible. But wholesale repeal? It looks like a very difficult task.