“There will be setbacks and false starts. There are many who won’t agree with every decision or policy I make as president. And we know the government can’t solve every problem. But I will always be honest with you about the challenges we face. I will listen to you, especially when we disagree.”
These lines (plus the rest of Barack Obama’s deeply presidential and ethos, pathos and rhythm-ridden victory speech) fairly well sum up why and where his campaign succeeded and John McCain’s didn’t.