Bayh’s been the second-most conservative Democrat in the 111th Senate (after Ben Nelson), but still to the left of all the Republican members. Interestingly, the Bayh/Lugar pairing in Indiana is just about the only instance of two Senators from different parties representing the same state with a somewhat similar voting record. Other states with split Senate delegations see huge chasms between the voting records of the Senators.
I don’t have anything intelligent to add, I just wasn’t aware of this.
Update. Do you think Bayh is coordinating all of this with Rahm?