Looking at the polling in the Dem primary, it's clear that there is a "Biden Effect."
What is Biden's impact? Where would his supporters go if he decides not to run? A few polls ask the question.
In the Fox poll, including Biden yields a 44-30-18 result, Clinton-Sanders-Biden. And without Biden?
It's Clinton 56, Sanders 32. Clinton up 12 and Sanders up 2. Obviously no Biden helps Clinton.
In the CBS/NYT poll, the effect is similar. The with Biden result is 47-27-15. Without Biden?
It's Clinton 58, Sanders 28. Clinton up 11, Sanders up 1.
In the ABC /WaPo poll, with Biden, it is 42-24-21.
Without Biden, it's Clinton 56, Sanders 28. Clinton up 14, Sanders up 4.
In the Q poll with Biden, it's 43-25-18.
Without Biden, it's Clinton 53, Sanders 30. So Clinton up 10, Sanders up 5.
The upshot is pretty obvious and not particularly surprising - Biden takes more from Clinton. Biden out and her margins are very healthy.
Sanders continues to be bedeviled by an inability to break through to PoC. This remains the key issue for Sanders.
If I ran his campaign, it's what I would be working on 24/7.