Yup...that's the political risk for both parties. Democrats own it. Even though most of the ideas are market based ideas which originated with previous Republican administration. The PP&ACA was passed through congress without a single Republican vote.
and that's the risk...if the ACA works and becomes popular...and it is already starting to do so, then Democrats will own that. If it flops, then they will still own it.
The GOP opposition is almost solely politically based on that they expect it to succeed and Dems will own it and not them.