It's not math, it's calculus! - ooh I like that.

http://www.huffingtonpost.com/seth-abramson/the-democrats-are-headed-for-a-contested-convention-too_b_9620362.html

So here’s what the Sanders campaign and certain commentators have been trying to tell us about “the math”: the math shows that the Clinton campaign is collapsing. The math shows that super-delegates backed Clinton before any votes had been cast and before her campaign had imploded — an implosion that was not so much caused by unforced errors but by the historic strength of the Sanders campaign, as evidenced by its mobilization of young voters, record-breaking fundraising, and, most importantly, upward trajectory in the actual voting across the course of a five-month presidential primary season. And the math will show that Bernie Sanders polls much better than Clinton against every possible Republican candidate both nationally and in every battleground state.

But most importantly, the math would show, in this scenario, that not only had all the comparisons to the 2008 primary race been inapt, but that all the references to primary “math” as algebraic had occluded the fact that, in actuality, what we’re dealing with here is a very complicated — and deeply human — calculus.

And that calculus is leading the Democratic Party straight to a contested convention in Philadelphia this summer.