Mashable reports:

While 23 states have sanctioned medical marijuana in some way, only four of those have also legalized recreational weed. Recreational marijuana supporters worry that a successful push for medical marijuana will leave politicians without incentive to also legalize recreational weed.

“Folks who are really dramatic supporters of reform want recreational reform, not just medical reform,” said Doug Berman, a criminal law professor at Ohio State University. “That’s where the interesting rubber hits the road.”

That debate will probably play out differently in states across the country. In the meantime, the experts we spoke with said they wouldn’t be stunned if the Sanders bill—or one like it—makes its way to federal law.