 Biden refrained from criticizing Palin, concentrating his criticisms on McCain.While Palin offered brief criticism of Biden, she concentrated most of her criticism on Democratic presidential nominee Barack Obama.Whereas Biden defended against Palin's criticisms of Obama, Palin tended not to offer detailed defenses against Biden's criticisms of Republican nominee John McCain and the George W. Bush administration, emphasizing instead generalizations about McCain and Palin's plans to reform the ways of Washington.