I don't know what you broadly or narrowly classify as "vote rigging", but apparently Elizabeth Warren said the race was rigged [1], and another article [2] explains some of what happened, which "was not a criminal act, but as I saw it, it compromised the party’s integrity".
My understanding is Hillary's nomination came about because she had many of the delegates that don't represent voters, whereas Bernie Sanders had the majority of the votes from those who do represent voters. So, the nomination of Hillary over Sanders was not democratic.
> My understanding is Hillary's nomination came about because she had many of the delegates that don't represent voters, whereas Bernie Sanders had the majority of the votes from those who do represent voters.
This is incorrect. Clinton had a majority of the pledged (primary/caucus-determined) delegates, though not an absolute majority of all delegates based on super delegates alone.
The early huge advantage in unpledged “superdelegates” played a role in media coverage and the perception of inevitability, and no doubt helped her win, but she got more of the delegates selected by voters than Sanders did.
She also had the financial fate of the DNC in her hands, and, as early as 2015, had a secret agreement giving her power of the party's finances, strategy, and all the money raised. Additionally, as per Donna Brazile: "Her campaign had the right of refusal of who would be the party communications director, and it would make final decisions on all the other staff."
Have you followed the news at all? This is not even up for debate.
The DNC was hacked and the emails released to hurt Hillary Clinton and to aid the Trump campaign. It is not yet known if the Trump campaign was involved, but it is a fact that the emails were released to aid his campaign. Here are some links:
Guccifer 2.0 is the hacker involved in the DNC emails.
[1] https://www.bbc.com/news/world-us-canada-41850798
[2] https://www.politico.com/magazine/story/2017/11/02/clinton-b...