Im not going to tell you how to write your paper, but I thought I would make a suggestion as to the approach of paper. just a thought but, instead of writing about how cannabis would be regulated under legalization, talk about WHY it should be legalized, or HOW to get it legalized.

those topics are rarely covered in an intelligent manner, so your paper would be more unique!

talking points: mention MJs negative stigma and address reefer madness propaganda or even the prohibitions' roots in racism; dispute myths about harm MJ does to the body (and mind) and research how it actually helps the body (and mind); and maybe even talk about what the US would have to benefit from the legalization of it (financial gains mainly).