You never see Hillary Clinton or John McCain or any other presidential candidate wearing sunglasses. Or.... wait... did Bill Clinton wear sunglasses when he played the saxophone on the Arsenio Hall show?
Did you remember it right? Even without sunglasses though, Bill Clinton was projecting coolness. He was the last Democrat to win the presidency, so... maybe coolness is required. Maybe being a Southern governor is required. We shall see. Maybe it's coolness that works for the Democratic candidate. UPDATE: In the comments, Pissed Off Hillbilly: "Clinton played 2 songs that night. He wore sunglasses on the second one, Heartbreak Hotel." Ah! So that wasn't the embellishment of memory. And maybe we can catch somebody else in sunglasses: More? Maybe they are Transitions lenses.