Her rank and file supporters don't pick the party nominee. That is generally done by the power brokers within the party. In 2 years many of the old Dem guard will be moving on, and the progressives who are taking over the Dem party owe Hillary nothing and she offers them nothing, therefore she isn't going to get the nod.
Ask the Bernie Sanders supporters how that worked out ???
The Democratic Party much like the Republican Party are slaves to money, if Hillary can raise the cash she will be a contender.
If the Democrats take a real beating in the 2022 midterms all bets are off for the progressives.
We should all be rooting for Hillary, she’s beatable and her candidacy would start open civil war inside the democratic party.
Nothing would please me more than Trump defeating her again.