My sister-in-law went to see Barack Obama:

I didn’t really see Obama — I glimpsed a distant white shirt (as one fellow near me said, “You know how he always wears his shirt with his sleeves rolled up”). But I know why he wears that shirt; if he’d worn his dark suit jacket, I wouldn’t have been able to make him out at all. I could hear him though, and the crowd was congenial.