Either: a) vote in the republican primary, preferably for someone other than McCain to keep the competition in the running
Or b) Vote Undecided!
Yes, the ONLY way to vote for a democrat other than the very few candidates who are listed on the democratic ballot is to vote undecided. write-in campaigns are not authorized!! if 15 % or more of michigan's democrats vote undecided, then if we get to send delegates to the national convention they will not be tied to voting for someone on the current ballot and can then support Obama or Edwards or whomever.