People in Colorado still remember John Hickenlooper’s crack after the state legalized marijuana, a move he opposed: “Don’t break out the Cheetos or Goldfish too quickly.”
But Mr. Hickenlooper, the governor at the time of the 2012 initiative allowing recreational use of cannabis, eventually changed his mind. He acknowledged that fears of increased use by children did not materialize, and he boasted of the tax revenues for social programs that regulated sales delivered.
Entering the Democratic presidential race this month, Mr. Hickenlooper joined a field already jammed with pro-legalization candidates, a reflection of swiftly changing public opinion since Colorado became the first of 10 states with legal recreational marijuana.
The issue today is a pillar of progressive politics, but not because of graying hippies who like their Rocky Mountain High. Rather, for many Democrats,…