I did the trip from liberal or more precisely, ignorant, to libertarian to conservative. Libertarian had lot of intellectual appeal to me 25 years ago, but I was still clueless. Lately (for about 25 years) I have reading Chronicles, the magazine that documents the decline of American culture. Drug legalization is part and parcel of that decline.
But it didn't hit home until the past couple of years where I had to deal with stoners both juvenile and juvenile-adult. Some might think the worst thing stoners can do is forget to go vote and sit out the election. But the worst problem is the long term effect of excessive medication. Ultimately I would expect Obamacare to cover "medical" marijuana as long as it is inexpensive (the only criteria for coverage). As with "medical" abortion, morality is not a consideration.
Just look at the cultures that have used Cannabis as an intoxicant for thousands of years, and how they resemble a stoner’s life, versus Western Civilization which refused to adopt Cannabis as an intoxicant during those same thousands of years.