Is the push for U.S. marijuana legalization reaching critical mass?

By Alicia Wallace, The Cannabist Staff

It’s a pivotal moment for marijuana in the United States.

Come Tuesday, voters in five states — Arizona, California, Massachusetts, Maine and Nevada — will decide whether to legalize the recreational use of cannabis; and residents in four other states — Arkansas, Florida, Montana and North Dakota — will weigh medical marijuana measures.

“It’s hard to imagine that all nine ballot initiatives fail,” said John Hudak, a marijuana policy…