Obama Testing Vice President Chemistry

Sam Nunn and Evan Bayh (Bayh supported Hillary in a big way) will join Obama on the campaign trail. Anyone but Ed Rendell. I hear his name a lot but after seeing him lie for Hillary during the primaries, he seems as old school as it gets. Here's another tidbit, if California Gov. Arnold Schwarzenegger is going to be the environment and energy czar, what happens to Al Gore? Vice president?

CNN: The Illinois senator is set to be joined on the trail by Indiana Sen. Evan Bayh and former Georgia Sen. Sam Nunn — two Democrats widely believed to be on the shortlist for the vice presidential spot.

The two are set to join Obama at Purdue University in West Lafayette, Indiana for a discussion on national security issues — a forum that is designed to set to stage for the Democratic president candidate's overseas trip next week.

Specifically, the three are set to discuss nuclear non-proliferation, bioterrorism, cyber security and emerging national security threats.

Bayh, who comes from a powerful Indiana family and once served as governor of the state, remains a very popular figure there. His aggressive campaigning on behalf of Hillary Clinton during the state's Democratic primary is widely seen as a chief factor for the New York senator's narrow victory there. He briefly flirted with his own presidential bid late last year but ultimately ruled against it.

Nunn remains one of the most respected national security and foreign policy experts on the national scene. The former senator has a serious, no-nonsense demeanor that would add instant gravitas to the ticket, and he is a popular figure in Georgia — a state the Obama campaign hopes to make competitive this cycle.