Sen. Elizabeth Warren says she cast a vote in favor of legalization of recreational marijuana in Massachusetts when the proposal was on the November 2016 ballot.

"I supported it because I just thought it made sense," the Cambridge Democrat told Rolling Stone in an interview published this week.

That puts her on a short list of Massachusetts politicians, including Holyoke Mayor Alex Morse and the Boston City Council's president at the time, Michelle Wu, who voted for the ballot initiative, then known as Question 4.

Warren also told Rolling Stone she has not ever personally smoked marijuana.

Marijuana remains illegal at the federal level as Massachusetts regulators are overseeing the expected openings of retail pot shops.

In last week's sit-down with Rolling Stone in her D.C. office, Warren said she had endorsed the 2016 ballot initiative.

But Rolling Stone and the news site Marijuana Moment noted that Warren had not actually endorsed Question 4.

"She meant she voted for the 2016 ballot initiative," a Warren spokesperson said in an email to MassLive.

The 2016 ballot question drew bipartisan opposition, from Republican Gov. Charlie Baker to the Democratic mayor of Boston, Marty Walsh. Massachusetts voters backed legalization, 54 percent to 46 percent.

The five-member Massachusetts Cannabis Control Commission, created under the 2016 law and expanded under the subsequent legislative rewrite signed by Baker, has just one member, Shaleen Title, who voted for the question.

Earlier this year, Warren unveiled a bill she is co-sponsoring with Sen. Cory Gardner, a Colorado Republican, aimed at protecting states' marijuana votes and rights from interference by federal law enforcement.

The bill, which has Gov. Baker's support, would also allow marijuana businesses to more easily access the banking industry.

While appearing on the MSNBC show "Morning Joe" with Sen. Gardner in June 2018 to promote their bill, Warren said she supported legalization in her state and noted that Massachusetts voters had already signed off on marijuana for medical use and decriminalized the controversial substance in previous election cycles.

Months before voters went to the polls in 2016, Warren was asked by MassLive about the ballot question. The senator said she was "open" to legalization.

Asked whether she would vote "yes" on the ballot question, Warren said, "What I just said is that I would be open to it because I think that the problem we've got right now in Massachusetts is that we've decriminalized it which makes marijuana available but there's no regulation over it for safety."

At the time, Warren's comment that she was "open" to legalization cheered marijuana activists who were pushing the ballot question.