Bernie Sanders is unlikely to secure the nomination, whereas all of the delegate numbers favor Clinton. Source

Assuming that Sanders gets all of the currently un-committed super-delegates, he would pick up another 210. He would still need to capture 1,172 of the remaining 1,833 delegates or 63.93%. So far, Sanders has only been able to manufacture delegate wins of that size in 3 states, 4 if you count New Hampshire. NONE of those wins came in a contest worth more than 35 delegates. In other words, the proportional primary process means that Sanders probably cannot win big enough to beat Clinton even if he wins all of the remaining contests because he will not win big enough to get to 64%.

His only real hope is to beat Clinton the rest of the way by 55% or so and then convince the currently committed to Clinton super-delegates to change their minds. This is possible, but strongly improbable.