For some reason, CNN keeps giving superdelegates to candidates. "Superdelegates" are delegates that are not pledged to a specific candidate. For example, Arizona has 67 delegates and 11 superdelegates. This means that, after the Feb. 5 primary, 67 delegates will be obligated to vote for a particular candidate, and 11 will be free to make up their minds how they want. Liken them to "at-large" delegates. But their allegiances are far from certain.

CNN makes guesses about who gets superdelegates, adds them to the pledged delegate totals, and then puts the sum on their Election Center front page. It's 725 for Hillary to 636 for Obama, which sounds like quite a disparity, until you remove the superdelegates. In terms of pledged delegates, Hillary has 532, while Obama has 530. The race is much closer than it initially appears.