Voting uncommitted in the primary is so obviously the right choice whether you do the "harm reduction" vote for Biden, vote for an independent candidate or just leave it blank/ not show up for the presidential election. Embarrassing the Dems by having 100,000's of their own primary voters writing in uncommitted is exactly what groups like the DSA should be telling their registered dem members to do, even if they're outside of Michigan. It would be very significant if a large amount of people did this, probably the most effective leverage you could possibly apply on them through electoralism, I may just not know about it, but I don't know if a primary has ever been weaponized against an incumbent candidate like this before in the US.