Ari Melber has a great piece on Bayh. The money quote is here, on Iran.
You just hope that we haven't soured an entire generation on the necessity, from time to time, of using force because Iraq has been such a debacle. That would be tragic, because Iran is a grave threat. They're everything we thought Iraq was but wasn't. They are seeking nuclear weapons, they do support terrorists, they have threatened to destroy Israel, and they've threatened us, too.
Obama would do a great service by resisting the siren call to pick this guy. While I'd still pull the lever for an Obama/Bayh ticket, Bayh as VP really would turn this contest into a lesser of two evils type race. And as VP, if Bayh's going to help Obama govern, that's discouraging. And if Bayh ever has to step in as President, God help us.