CNN is reporting it won't be either of them.
Ambinder says the text will be sent tomorrow AM
According to a campaign official, the plan is to send out the text message a few hours before Obama's 12pm CT event in Springfield.
Most everyone in the national press corps think that it's Joe Biden. But no one knows, and no one is willing to pull the trigger.
I can confirm reporting by NBC News that Gov. Tim Kaine's associates are saying that Obama did not choose him, although I don't have any first hand accounts.
Sources close to Biden and Bayh have been in lockdown mode.
And Crowley wonders:
What the Hell Is Taking So Long?
I have no idea, but I'd guess it points to a bigger name rather than a smaller one. (I think Jonathan Cohn made a version of this point earlier in the week, though I can't remember if he did it online or during one of our many rounds of internal speculation.)
So...Who is it gonna be?