Hillary Clinton's campaign won't implode because of her emails, or Bengazi, or any of the old Clinton scandals, but because she is irrelevant. If the Democrats don't find an alternative, they will lose in 2016.
Clinton is not so much a personality as an average: an average of 10,000 focus groups. She has sold her soul for the safety of the political center, which has drifted so far to the right that she has lost her identity as a liberal or a Democrat.
Clinton and Jeb Bush are virtually indistinguishable to me: a single ticket running for the corporate party, combining the Texas wing of the Saudi oil dynasty with the Wall Street banking cartel.
If Elizabeth Warren or Bernie Sanders run, I will ring door bells all day to get out the vote. If Clinton runs, why bother?