Here’s an excerpt from Caroline Kennedy’s endorsement of Obama that I think captures this well:
“I want a president who understands that his responsibility is to articulate a vision and encourage others to achieve it; who holds himself, and those around him, to the highest ethical standards; who appeals to the hopes of those who still believe in the American Dream, and those around the world who still believe in the American ideal; and who can lift our spirits, and make us believe again that our country needs every one of us to get involved.

I have never had a president who inspired me the way people tell me that my father inspired them. But for the first time, I believe I have found the man who could be that president — not just for me, but for a new generation of Americans.”