There may be more polls out this weekend, but there is a fair amount of data, plus predictions for 3 states from Nate Silver.
Let me go one state at a time.
DE only one poll, by Gravis, just released, which has Clinton up 45-38. They do not have a very good track record. Most recently, they put out two polls in a week for NY in each case showing Clinton with only a 6 point margin, when she actually won by 16.
Clinton has been endorsed by the Governor.
I would not make percentage predictions based on the Gravis poll, but would say with a fair amount of certainty that Clinton will win, almost certainly by something more than what the poll shows. This is a closed primary.
RI — the only polls were done in February by Brown University, back to back.
2.17-21 showed Clinton trailing 41-48
2.22-23 showed Clinton leading 49-40
That kind of 16 point swing in such a short period raises real questions about methodology and reliability of the poll.
On the one hand, RI is a New England State, which might help Sanders. It is not clear the gun issue will hurt him as much as it does in CT. On the other hand, MA is between RI and VT, and Sanders lost MA. Clinton has been endorsed by the state’s largest newspaper, the Providence Journal, as well as by the Governor, both Senators, and the Secretary of State among others.
My gut says this is probably the best shot for Sanders, but on the other hand, I really do not see him winning it. I suspect a high single digit to low double digit Clinton win. This is NOT a closed primary, which is one reason I make this the best possibility for Sanders.