There are some fundamental things that are needed to have any understanding of national polling or else you will be caught talking about things in way that make no sense. This is the trap that www.Hillaryhub.com is currently spinning, arguing furiously that the New Washington Post-ABC News poll is good news for her campaign, when it is at best neutral and actually probably bad. All information can be found at http://www.realclearpolitics.com/...
The only real way to measure polling is not across different surveys but when surveys are done over a period of time to track the trend within the polls. Last Month at the very same time the Washington ABC-Post Poll showed Hillary Clinton ahead by a whopping 33 points, 53-20, her largest margin to date in any survey. This month that lead has shrunk, from 33 points, to now 49-26 or 23 points. That is of course is still a sizable lead but it is going in the wrong direction.
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