Overheard, and they weren't even blonde

Woman one: "Heh, heh, I just heard them say 'caucus' again."

Woman two: "Heh, heh. Hey, what exactly is a caucus, and why do only two states have them?"

(Long pause.)

Woman one: "I don't know."

Woman two: "No, seriously."

Woman one: "I really don't know. It's when they vote on something."