Land of purple waters?

Minnesota, largely written off by the GOP as hopelessly liberal, now is a dead heat between McCain and Obama, according to a new poll. What makes this poll really interesting is that Star Tribune polls have so favored Democrats in the past that most serious analysts consider them close useless. Quote:
Minnesota has become a battleground in a presidential campaign that has dramatically tightened nationwide.

A new Star Tribune Minnesota Poll shows that the race is now a dead heat between Barack Obama and John McCain, each supported by 45 percent of likely voters in the state