You're voting for whomever you think is the best poster-child for Republican craziness, however you define it. That doesn't necessarily mean mean you have to pick the person who's crazier. For example, you might think Herman Cain is more off his rocker than Jim DeMint, but that Jim DeMint is a better poster-child because he's got more clout in the GOP and conservative movement than Cain. It's entirely up to you.
With that out of the way, here are the matchups:
Remember, you can vote from a single page or follow the individual links above. As with yesterday, you've got until about 8:30 AM ET on Sunday to cast your ballot.
You can see the full tournament bracket as well as yesterday's results here.