The hot potato was "super delegates"
Because of this system, the Washington Post points out, Sanders could technically win the primary election, earning a majority of the 1,670 delegates determined by actual voting, but still lose the Democratic Party’s nomination, if Clinton gets most of the party’s 712 unelected unpledged delegates.
Critics have begun to ask why this undemocratic system exists. CNN’s Jake Tapper posed precisely this question to Democratic National Committee Chair Debbie Wasserman Schultz, an ally of Hillary Clinton who co-chaired her former presidential; campaign, in a Feb. 11 interview. She responded with shockingly blunt honesty.
The question asked of the chairperson in a CNN interview was;
“What do you tell voters who are new to the process who say this makes them feel like it’s all rigged?” Tapper asked the DNC chair.
Her answer was;
“Unpledged delegates exist really to make sure that party leaders and elected officials don’t have to be in a position where they are running against grassroots activists,” Wasserman Schultz calmly explained.
Un-Democratic Party: DNC chair says superdelegates ensure elites don’t have to run “against grassroots activists” - Salon.com
On it's face it sounds like the Democrat Establishment just want's to keep order in the ranks, but considering what happened in New Hampshire there's a lot more going on than what is said.
Fortunately for voters there is one "grass roots" candidate the DNC Establishment is not going to stop so easily.
Sanders supporters demand that superdelegates follow 'the will of voters'