Quote from John_Wensink:
I'm more afraid of the guy who thinks there are 57 states in the US.
Are you? Because I can understand the occasional one-off misstatement from any candidate, whether its McCain or Obama.
But when a candidate starts repeating his errors (such as McCain's Czechoslovakia which he's said over and over) or Sunni/Shia problem (which he's made at least four times) that indicates that the person really doesn't understand.