Kos Straw Poll (Hillary Clinton Group) [View all]
http://www.dailykos.com/stories/2016/2/23/1489795/-Daily-Kos-Democratic-Primary-Straw-Poll-2-23-16
Let's start out by stating, definitively, that straw polls mean diddly squat nothing null zero jack.
Just to be quite emphatic about that.
However, it's interesting to note the erosion in Sanders' numbers even on a sister site that's notoriously liberal. Just working from the very end of last year (when the Sanders campaign really got rolling):
12/29/15: Sanders 73, Clinton 26
1/13/16: Sanders 65 (-8), Clinton 32 (+8)
1/26/16: Sanders 61 (-4, -12 overall), Clinton 35 (+3, +11 overall)
2/23/16: Sanders 53 (-8, -20 overall), Clinton 44 (+9, +20 overall)
(the last entry can be found at the current poll at the bottom of the page)
Again, this means nothing, but I found the trend line interesting. From a very strong +47 dominance, Sanders has fallen to a scant +7 lead in what should be a bastion of very strong support for him.