This will be a much harder sell to the public - cannabis legalisation had been helped by decades of "Medical Marijuana" - but there has no such inoculation of public opinion for mushrooms yet.

Under MM a voter will likely have known a friend or a relative who tried MM and had a positive impression - this was someone who did weed who wasn't a pusher, lowlife or degenerate. But of all the people I know who have done shrooms: those that aren't exactly poster-children for legalization tend to the type that are the most vocal about effecting change. In short: we need more white, middle-class, middle-aged married couples to openly talk positively about doing drugs!

Until then, I think a better proposal would be a law that strikes down the DEA's concept that drugs can "...[have] no currently accepted medical use in treatment in the United States." when quite the opposite is true - it damages the credibility of drug enforcement agencies to parrot these lines when there is evidence of both medicinal value and the politicalisation of prohibition (namely http://www.cnn.com/2016/03/23/politics/john-ehrlichman-richa... ).

Remove the dogma - and irrational stigma - from drug laws first, then begin more specific targeting for legalisation and regulation.