Sen. Bernie Sanders on Thursday became the latest senator to co-sponsor Sen. Cory Booker’s bill that would legalize marijuana.

The other co-sponsors are Sens. Ron Wyden of Oregon and Kirsten Gillibrand of New York. Gillibrand is considered a potential contender for the 2020 Democratic presidential nomination alongside Booker and Sanders.

Sanders raised concerns about the possibility that people arrested for marijuana charges losing their right to vote during a Facebook live feed.

“What we’re talking about here is not just criminal justice in the narrow sense, you’re talking about the destruction of democratic rights,” he said.

Booker’s legislation not only would legalize marijuana but would allow people convicted of marijuana possession to have their records expunged. It would also give incentives to states and local governments to change their laws if they disproportionately affected communities of color.