The rush to qualify for the upcoming third round of the Democratic Presidential debates raises a lot of questions. How much should be enough to qualify.  How many are too many when it comes to candidates taking part in a single debate.  10?  We’ve done 10?  11? 12?  Or does that mandate a pair of 6’s?  And how could a co-called national poll of 298 people carry so much weight? John Nichols of The Nation helps sort out the story.