Medical marijuana on Michigan ballot

It will probably require official certification before it's a completely done deal, but it looks as if advocates have gotten a medical marijuana initiative on the ballot in Michigan, for the November 2008 ballot. That would make Michigan the 13th state. It could be especially interesting given that that's the presidential general election date. Might that mean, given Michigan's size and potential importance, that the presidential candidates might have to address the issue seriously? I know advocates in New Hampshire have been attending campaign events and putting the question to candidates as to whether they would support a change in federal law or stop the feds from raiding dispensaries or arresting patients. But having the issue on the ballot in Michigan could be quite important.