As California voters prepare to vote on Proposition 19, which would bring a much-needed end to nearly 100 years of failed marijuana prohibition in that state, it's important to pay attention to the arguments that proponents use to persuade the electorate to vote in favor of taxing and regulating marijuana like alcohol (T&R). How an issue is framed can make or break it, as seen by efforts to reduce penalties for crack cocaine and peyote. On August 3, President Obama signed a bill into law that reduced…