Actually, if you bothered to look at the campaign funding, you would see that it was the alcohol lobby, the prison guard unions, police unions and the private prison corporations that piled millions into the effort to defeat it because it was going to interfere with their business model. But don't let what really happened get in the way of that fetish for using big government to make people live the way you say they should.
Those probably all oppose legalized meth too. Can we start there since all drugs are apparently the same to legalizers?