The Bernie Iowa Factor

The Iowa  caucus has worked fine for a very long time. the party decided to use the app only after another proposal for reporting votes — which entailed having caucus participants call in their votes over the phone 
was abandoned

On the advice of Democratic National Committee (DNC) officials, according to David Jefferson, a board member of Verified Voting, a nonpartisan election integrity organization.

Matt Blaze, a professor of computer science and law at Georgetown, said that introducing apps in the midst of an election exposed many problems. The consensus of all experts who have been thinking about this is unequivocal. Internet and mobile voting should not be used at this time 
in civil elections.

Another form of voter suppression, are they trying to make us lose faith in the electoral process or the DNC didn't get the result they wanted? HERE
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There Are Enough Irregularities in Iowa Caucus to Suspect Rigging Against Sanders: the Problems HERE