The only thing that will really work is something that looks a lot more like universal healthcare, with far lower costs both to buy in and at the point of use. That doesn't mean eliminating private healthcare but it does mean raising the baseline for everyone so everyone ca always get care.
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With some fluctuations and exceptions (marriage equality …), consistent Overton Window shift to the right
Look to ACA: structured aligned with a Heritage originated approach yet a huge “left” win.