[DNC attorneys assert that the party has every right to favor one candidate or another, despite their party rules that state otherwise because, after all, they are a private corporation and they can change their rules if they want.]

What part of "they can change their rules if they want" did you not understand? The headline of that propaganda rag is contradictory and wrong. You can tell because it tells a Trumpian lie: "End Rigged Elections". That stuff comes from Putin and Treason Trump.