From The Washington Post:
The $500,000 donation from Insys Therapeutics, based in Chandler, Ariz., amounts to more than one-third of all money raised by Arizonans for Responsible Drug Policy, the group opposing legalization. It's one of the largest single contributions to any anti-legalization campaign ever, according to campaign finance records maintained by ballotpedia.com.Surprise, surprise, the company also has a storied history of legal troubles.
The battle for legalization in Arizona is projected to be close this year. Election day in Tuesday, November 8th.