No. By that logic you could start the Murder Party and 'sell' murder for profit. Parties only 'sell' ideas in as much as they try to convince people to vote and donate. They can't charge membership and they certainly aren't pushing a physical commodity or service (well, I guess they are kinda, but people are going to get it whether they like it or not). You could start a party that's sole purpose is to elect people who will legalize marijuana and that isn't illegal, but you can't do something illegal without risking punishment.