ok, so I'm sharing my ignorance... In doing some research (wikipedia, obviously) on what exactly a caucus was and refreshing my high school govt knowledge on how electoral process works, I ran across a few other words I've probably heard a thousand times but didn't realize I didn't know the right meaning to... a prime example: GOP. Luckily it seems that the Wall Street journal thinks a bunch of other people didn't know either.

some Wikipedia definitions:
Caucus
Presidential election
GOP