There was a lawsuit against Bernie Sanders:
People who had donated to his campaign wanted their money back the ruling of the judge was that the Democrat Party was a corporation and they could choose a candidate any way they wanted.
This included just appointing a candidate for President. So any Democrat who thinks their vote counts in any primary needs to think again' They can take your money and then bypass any vote no matter how the primary results end up.
As a corporation they can do whatever they want, things have changed.
A class action lawsuit alleging the Democratic National Committee worked in conjunction with Hillary Clinton's 2016 campaign to keep Bernie Sanders out of the White House has been raging on in the courtrooms for months on end–and yet, most people have no idea of its existence, in large part thanks to the mainstream media's total lack of coverage.