U.S. Sen. Elizabeth Warren says she's open to proposed ballot questions that would legalize the recreational use of marijuana.
The comments mark a shift for Warren, who supported the medical use of marijuana but opposed full legalization during her 2012 campaign.
Warren said the country has learned more about legalizing marijuana since then, noting a couple of states have already taken the step.
Warren said the country should be learning from those states. She said she'd encourage more research into the effects of legalization.
She said she's also been pushing the federal government to study the medicinal use of marijuana.
Four questions submitted by two separate groups for the 2016 ballot would allow the adult recreational use of marijuana.
Warren made the comments Wednesday at an event sponsored by The Boston Globe and Suffolk University.