At least Obama won't be able to write it off as a safe state.
Yes he will.
I'm not saying McCain is going to win Minnesota, just saying Pawlenty will help make it more competitive than the polls are showing it to be right now. Minnesota is not a solidly Democratic state anymore.
Let me rephrase it. Minnesota is not a safe state in the same vein as Massachusetts. It is not a state that Obama will win by 20 like he will in Massachusetts.
I suppose it would be considered a "swing state". But I highly doubt it will be contested all that much and Obama should win it by 5 or so points.