Yesterday, Sanders needed 54% of remaining delegates. Today he needs 58%.

[MineralMan]

4. There are still some very large states, with large delegations, left

to hold primaries. Some of them, NY, PA and NJ are unlikely to move far from current polling. Clinton has considerable momentum after yesterday. California, the other mega-state, does have open primaries. However, polling there is still in Clinton's favor and there is that momentum issue.

If Sanders hopes to win any of those four states, he's going to have to focus almost all of his energy and funds on them. I doubt if that is his plan, frankly. He put a lot of money into Ohio and Illinois, only to lose in both of those states. He put less into Florida and NC, and lost those even more clearly. The four remaining high-delegate states are more like Florida and NC than Ohio. Those are must-wins for Senator Sanders, but they're going to be very, very tough states to win or even tie.

I imagine his campaign is working on strategy today, in hopes of finding a strategy that gives them a chance in the remaining large states. I don't know what that strategy would be, though.