system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In the US, could State governments implement universal healthcare for state residents?

I'm wondering if state systems could be an alternate way to achieve universal healthcare in the US.   Are there restrictions that would make this impossible?  And how might it differ if it did happen.
gpt
They could. Obamacare was actually modeled after a system Massachusetts implemented for itself, under Republican governor Mitt Romney. The Democrats picked that system partly because they believed it would be more palatable to Republicans on the federal level, which... didn't go so well.