To say that MI could go republican is like saying that Illinois could go republican. Both states were a win for Daddy Bush, and been Dem ever since. MI has more republicans at the state level due to gerrymandering, but republicans are in a slump as far as anything statewide. We have republicans on the state level who go to Lansing with only a fraction of the number of votes a Democrat receives in another disrict. I forgot exactly what the numbers were, but Democrats won far more votes than republican in '06 for State Senate, but the Republicans are still in charge of that chamber.
This is a waste of time, but:
Michigan was close in 2000, 2002, and 2004. Illinois almost went to Dukakis in 1988 and has been more and more Democrat ever since. There can be no comparison.