Why did Minnesota vote to the right of Michigan and Wisconsin in this election?

[un]

1. There was a very competitive Senate race here, Franken and Coleman were neck and neck in the polls for a while, and it obviously ended with Franken winning by 312 votes. That made Minnesota a very important state for the RNC to invest in, even holding the 2008 RNC here. That ended up hurting not just Franken, but Obama as well.

2. McCain also did a lot of campaigning here, thinking he could potentially flip it to put a wrench into Obama's electoral plan, essentially what he tried to do with Pennsylvania on a lesser scale. It failed in the end, but it did likely drop Obama's margin a bit. This is in contrast with Michigan and Wisconsin, states that McCain had abandoned near the end of the campaign due to lackluster polling numbers.