One line I recall from him (I didn't watch often) was when he was talking about wetbacks and he said "everybody knows that they're undocumented democrats".
And interesting comment from a showbiz big shot.
I recall this one from Leno: If Jesus were to come back now and see everything done commercially in his name, he’d start throwing up and never stop.
The Leno line I liked was: “I heard that the NBA’s Washington Bullets are changing their name because they don’t like the association with crime and violence. From now on, they will just be known as the Bullets.” :)