Well he does have a winning smile...and he knows how to use it.
"I learned to slip back and forth between my black and white worlds.
One of those tricks I had learned: People were satisfied so long as you
were courteous and smiled and made no sudden moves. They were more
than satisfied; they were relieved -- such a pleasant surprise to find a
well-mannered young black man who didn't seem angry all the time." Obama - "Dreams From My Father"