This is a great move, and as Jacob Heilbrunn explains, it’s a blow to McCain. Hagel is a veteran as well and aa Republican Senator who opposes the Bush administration policy in Iraq.

I’m curious to see who else joins Obama as it might signal potential VP picks. Biden seems like an obvious choice for the trip regardless of whether Obama is seriously considering him for the trip, but if Evan Bayh joins them, it increases the odds that he’s the pick.