Surely this race is beyond any previous level of intensity when one candidate's supporter offers students a $1,000,000 "donation" to their political organization in exchange for an endorsement...

Naming the candidate who's major donor reached out to the Young Democrats of America would sound like an attack. After all, it's not the candidate or even the campaign that's to blame, but the desperation of each Democratic candidate's supporters to end the race that is so telling here. The story, via the Huffington Post, minus identifying details:

Haim Saban, the billionaire entertainment magnate and [...] supporter, denied the allegation. But four independent sources said that just before the North Carolina and Indiana primaries, Saban called YDA President David Hardt and offered what was perceived as a lucrative proposal: $1 million would be made available for the group if Hardt and the organization's other uncommitted superdelegate backed the Senator.

Nevertheless, the group declined the overture. A YDA official cited moral reservations as well as the overwhelming consensus of its members to [not necessarily endorse that particular candidate - Ed.]

We discourage you from finding out the name of the candidate NOT involved, although we must link to the story anyway, to cover our asses. (If you do cave and read it at the Huffington Post, make sure to read all of it, including the final paragraph.) 

Clearly, this man will be played by one of our favorite Deadwood stars in the Hillary Vs. Barack TV movie: