Racist "Vote Republican" billboard from 1948.

(Click photo, via Pittsburgh, by Teenie Harris, who photographed the city's African American community from 1930s—1970s. Thanks Joseph.)
"Well, we want his hands to be dark, but not completely black, so it gives us some wiggle room. Yeah, that's good. But we need that little girl to be lily fucking white. Perfect." Newt Gingrich approves of this message. Related: the most honest political billboard in the history of the world.