“Don't break out the Cheetos or Gold Fish too quickly,” quipped Colorado Governor John Hickenlooper after election results confirmed that his state's voters had legalized the personal use of marijuana.

He cautioned of a “complicated process” local lawmakers had ahead of them in balancing the will of voters with the federal government's continued assertion that the drug remains a Schedule I controlled substance.

As of last month's election, 18 states have approved the use of medical marijuana. Outright legalization was on the ballot, and passed, in Washington and Colorado. Caught in the middle of legalization efforts and federal enforcement ...