second, the democrats have done a terrible job explaining the ACA to the public, so the public is ignorant. the ACA is like auto insurance. The individual mandate means that the cost of the uninsured showing up for care is shifted from the insured and the tax payers, where is is pre-ACA, to private insurance companies, where it belongs. Most people don't know this, even many, many democratic voters, because the leadership has done an amazing poor job explaining it. They find it easier to distance themselves from it because many of THEM haven't taken the time to understand it.
I have an uninsured relative who went to the emergency room with a swollen face. It turned out to be an infection from a piercing through his lip. It was a dangerous infection and a minor surgical procedure was required along with a two night stay and antibiotics. As an uninsured young man, he paid nothing. The hospital pays for these things from several directions. They "write off" losses for such as "charitable giving" to reduce tax liability which that takes care of a portion. This reduction in tax liability gets made up by others paying more in taxes, and/or deficits growing, in others words, there's no free lunch. They also charge insured people more for everything to offset some of the rest of their "loss". That's where eight dollar aspirins and many other inflated prices come from. Lastly, they cut their CEO's bonuses (NO I made that last one up just to see who's paying attention) "obamacare", on the other hand, will require my relative to buy his own PRIVATE insurance policy. This is how Obamacare shifts the burden of the uninsured from the insured and the taxpayers to the newly INSURED and the PRIVATE insurance companies.