Democrats now have another major healthcare overhaul proposal to weigh as they begin arguing in earnest about the post-Obamacare future: A proposal to let people enroll in Medicare beginning at age 50.

The plan, which is being dubbed by its lead sponsor as “Medicare 50,” would allow people to buy into Medicare if they are between the ages of 50 to 64. People could purchase Medicare as an alternative to Obamacare plans if they are uninsured or if they want it instead of the coverage they’re getting through work.