STILL think this hasn't been planned for a long time? One way or another, Michelle Obama's place on the ticket was going to be arranged. It's time for a few more articles like this.
The piece I'm linking to has a brand new reason why Biden should pick her: Since everybody knows she doesn't want to be in politics (right), his ability to convince her to do it will tell voters he has the persuasive power to be a leader! (See, this way, if she changes her mind, it won't be because she's wishy-washy or disingenuous but because Biden's such an incredibly persuasive guy.) The irony: if Michelle is on the ticket, it will be with the goal of making HER the leader.