Presidential nomination will finally be decided by the number of Delegates behind the candidate.
So Super Tuesday will give a vague idea about the trend .
"What, though, will constitute a decisive victory? A little fewer than 1,700 delegates are at stake for the Democrats on Super Tuesday (a fraction more than half of the total), and winning a bare majority will clearly not be enough for Mrs Clinton.
Should she win more than 1,100 to Mr Obama’s 600, she will probably be in the clear. Anything between those two extremes will be the subject of a protracted “spin” operation by the rival camps.
California, with 441 delegates, is the ultimate prize: even a narrow victory there will count, in news terms, for a huge amount. Likewise, a loss for Mrs Clinton in her home state of New York would be devastating, though that looks unlikely.
Then there are bellwether states like Missouri, which Mrs Clinton was originally supposed to be certain to win; these middle-America states are considered to be accurate predictors of national trends, and will be watched carefully.
With a large number of postal votes that won't be counted for many days, the results may not be known this week.Probably the most likely eventual outcome is an unclear result followed by a war of words, and a continuing cliff-hanger.
That's good news for political junkies at least.
http://www.economist.com/daily/news/displaystory.cfm?story_id=10635584