What will the US presidential candidates actually do?

If the Republican McCain gets elected, nothing much will change. But then nothing much is expected. What if Obama wins? He is still committed to the futile action in Afghanistan. He will also inherit the economic problems that have bubbled up. What will he actually do about those? He utters fine words but seems to have no policies that would address the USA's problems. A bit like Tony Blair in 1997, then. Expect nothing from him either.