Reuters primary polling: tracking thread.

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http://m.dailykos.com/story/2016/2/12/1484385/-Bernie-Surges-12-Clinton-Falls-11-in-Reuters-LV-Tracking-Poll-Sanders-Gains-13-With-Af-Ams
Reuters’ “likely democratic primary voter” screen excludes all self-identified independents, even though self identified independents made up about 24% of the electorate in the 2008 primaries. Even in a state with ultra-closed primaries like New York, exit polls say that self-identified Independents made up 12% of the electorate (with another 1% self-identified Republicans).

This is what the data in the polls say -

Sanders Gains 12% Nationally
Clinton looses 11% Nationally
Total Swing - 20%
Clinton leads Sanders by 8%

African Americans
Sanders Gains 13%
Clinton Looses 11%
Total Swings - 24%
Clinton leads 21%

Don't know how authentic but these are great numbers for Bernie, huge improvement & this does not consider independents. With independents, imagine what the figure would look like