Thanks to President Obama being reelected we get to keep or are stuck, depending on your perspective with. The 2012 Affordable Care Act of course better known as "Obamacare" and if it were to become popular. People seeing benefits like not losing their health insurance because they need it, or reach some lifetime or financial cap. Not getting denied health insurance because they have a pre existing condition, individuals who can't afford health insurance on their own getting help to pay for health insurance. Companies who want to provide their employees with health insurance but simply can't afford to do so. Hospitals and individuals no longer having to provide free healthcare, because everyone will be forced to cover. Their own healthcare in with the individual healthcare mandate, with costs of hospitals and health insurance going down as a result.
Some of these provisions are already popular and as the years go by with a Democratic President and Senate. It will become very difficult politically for Republicans to ever repeal the ACA, even if they win the Presidency back. And not pay a political price for doing that.