So, complete back of envelope delegate math here.
Assuming Bernie wins KS and NE 60/40, and takes Maine 70/30, and somehow manages to get 32% of the vote in Louisiana, he will get 73 delegates to Hillary's 61.
I think we all agree that March 8th will belong to Hillary as it's Michigan and Mississippi. That would give her (using current polling with all undecideds breaking to Bernie) 115 delegates to Bernie's 51.
Then we have March 15th. Even if I give Bernie the win in Ohio and Missouri (No polls, no idea how that will turn out), the best I can come up for him would be Hillary: 387, Bernie: 303. (This is like giving him a 50/50 split in freaking NC, btw)
That means, through March 5th and March 15th:
Hillary 563
Bernie 427
With currently allocated delegates:
Hillary 1172
Bernie 839
A lead of 333 delegates.
With Supers:
Hillary 1629
Bernie 861