If we just switch the Detroit and Toledo metropolitan areas with each other, Ohio would probably be a blue state(or at least bluer than average, like PA or MI) and Michigan would be red or purple by OTL's 2014.
EDIT: Crunching the numbers on this. Switching the Presidential election results with each other, Romney would've lost Michigan by only 3.8 percentage points in this scenario. IOTL he lost MI by 9.5. Likewise, Obama would've won Ohio by 7 points in TTL, IOTL he won by 1.9.
EDIT2: Extrapolating the 5.7 point GOP swing for MI and a 5.1 point Dem swing for, Bush would've won Michigan and lost Ohio(not enough to stop him from winning) in 2004. And Al Gore would've been President in 2000 due to MI and OH switching places, but I'd be wary of putting that swing that far back. Also, I'm lazy and don't feel like crunching the numbers again.
Of course, this would've led to a very different political situation, and yadda yadda. Still, fun thought experiment.