The American Primary election system explained in 5 minutes

Not really about design, but my fascination with USA politics.  Here is one of the best short explanation of how the Primary system works in the USA - Currently - Primaries and Caucases are being run for the Republican Party ('GOP' - for Grand Old Party) starting with Iowa (Caucus) and New Hampshire (Primary).

Anyway - look here for a great explanation with appropriately tacky visuals.