I’m actually going to disagree a bit here. I think that Hillary Clinton would have been more cautious when dealing with Republicans, and therefore ultimately more successful in some ways. At the very least, she would not be facing the same level of vehement opposition in Congress.
I think liberals really do not understand emotionally the extent to which the Tea Party was created by the Affordable Care Act and the feeling that its government was simply steamrolling it. From the Tea Party’s perspective, you had an unpopular program that should have died in the same way, and for the same reasons, that Social Security privatization did: because sensible politicians saw that, no matter how ardently they and their base might desire it, this was out of step with what the majority of the country wanted (and no, you cannot rescue the polls by claiming that the only problem with the law was that it wasn’t liberal enough; when you dig down into what people mean when they say that, the idea that there was ever a majority or a plurality that was secretly in favor of Obamacare collapses).
The rage was similar to what progressives felt as they watched George W. Bush push the country into a war in Iraq. That defined and animated the anti-war movement (which is why said movement collapsed when Bush left office, and not, say, when Bush agreed to a staged withdrawal of our forces). Yes, those people would still have hated Republicans, even if there had been no Iraq War. But they would not have been as passionate, as organized or as powerful without it.