There should be an American aptitude test. My emphasis added to the excerpt from a findlaw survey:
According to a December 2005 national survey conducted by FindLaw, only 43 percent of American adults can name at least one justice who is currently serving on the nation’s highest court. Fifty-seven percent of Americans can’t name any current U.S. Supreme Court justices.
More detail indicates that there are people who think George W. Bush is a supreme court justice.
I don’t even know how to comment on this sort of thing.