A ballot campaign seeking to legalize medical marijuana in Nebraska announced new support Monday from a group led by a former state senator and a firm that helps pass statewide ballot measures.

Nebraskans for Medical Marijuana said it is working with ADOPT, a coalition led by former state Sen. Tommy Garrett, of Bellevue. Garrett is an outspoken supporter of medical marijuana and previously introduced legalization bills in the Legislature.

The campaign said it has also hired 1st Tuesday Campaigns, a national group based in Washington D.C. and Los Angeles that has worked with ballot campaigns in other states.

Sen. Anna Wishart, of Lincoln, who co-chairs the ballot campaign, said ADOPT “reflects a broad coalition of Nebraskans that support access to medical cannabis and recognizes the health and economic benefits of passing this initiative.”

Opponents have argued that the drug could have harmful unintended consequences for youths and other potential users.