All you have to look at is his past and present affiliations and actions:
"From 2001 to 2005, Bayh served as Chairman of the Democratic Leadership Council (DLC). He is also a member of the Senate Centrist Coalition and helped establish the New Democrat Coalition. Bayh serves on the Board of Directors of the National Endowment for Democracy.
Bayh, in contrast to Senator Richard Lugar, was an early supporter of the Bush administration's policies on Iraq. On October 2, 2002, Bayh joined President George W. Bush and Congressional leaders in a Rose Garden ceremony announcing their agreement on the joint resolution authorizing the Iraq War, and was thanked by Bush and Senator John McCain for co-sponsoring the resolution."
And as governor of Indiana:
"Stressing fiscal responsibility, lower taxes, job creation and lean government, Bayh's tenure as governor was highlighted by eight years without raising taxes, the largest single tax cut and largest budget surplus in state history, "welfare-to-work" policies, increasing annual school funding, high academic standards and new college opportunities, the creation of over 350,000 new jobs, the strengthening of law enforcement and improved environmental quality. He signed the 21st Century Scholars Act in 1992, legislation that states that every child in Indiana who is eligible for the free lunch program in a public school, graduates from high school and signs a pledge not to experiment with illegal drugs is entitled to a full tuition scholarship to an Indiana public university of his or her choice. By the end of his second term, Bayh had an approval rating"
No doubt all of this indicates the Obama campaign's willingness to go back to their Progressive base.
His fiscal responsibility beliefs in action: