I saw this graphic on Twitter last night, which is the apotheosis of dumbness:
Massive voter suppression and fraud in #ArizonaPrimary! Shame on DNC! @DWStweets @HillaryClinton @BernieSanders pic.twitter.com/6FQTaq3Fte
— World For Bernie (@WorldForBernie) March 23, 2016
All the dumbness. All of it
The DNC (and for that matter the RNC, and for that further matter any and all of the individual Presidential campaigns currently still running in the primary) has literally nothing to do with any of litany of charges made in that graphic.
Elections in Arizona are overseen by the Secretary of State, one Michele Reagan, a Republican. They are executed by the counties. The largest county in Arizona is Maricopa, whose County Recorder is one Helen Purcell, also a Republican. I promise you that neither of these officials are taking any cues from the Democratic National Committee or Hillary Clinton.
Taking the charges on one by one: