How do you think this scenario would play out? Republicans would denounce the pick as evidence that Obama is not serious about governing. They would label the ticket the least experienced in history. They would say that Fargo is not qualified to be president, and all of this would be entirely true and fair. The media would begin a feeding frenzy--what if Obama had just chosen Fargo because he met her once and developed a rapport? The media would find some questionable things in her past, since everyone has some questionable things in their past, and the Obama ticket would probably go down in flames.
Barack has chosen Sacramento Mayor Heather Fargo as his Vice Presidential
The only difference as I see it between that situation and the one involving John McCain is that Fargo has eight years running a dynamic and diverse city, while Sarah Palin has about a year and a half running a state dominated by parochial interests. And Sacramento has a bit less people than Alaska. But let's take this in perspective: a complete WTF? is totally in order here.