[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/08/22/art.bayhcoo.ap.jpg caption="Bayh is 'cool' with Obama's decision, says a source."](CNN) - A source close to Evan Bayh expressed disappointment with the decision. "We are all sad," the source tells CNN. "But Evan was cool with this, whatever happened. He understands what he's got - a family, and a life he's very happy in."
The Indiana senator, son of 1976 presidential candidate Senator Birch Bayh, has been a perennial VP contender.