Bridgeport's Voting Scandal: A Case of Local Politics or Widespread Voter Fraud?

Following allegations of ballot-stuffing caught on camera, a judge orders a re-run of the Democratic primary in Bridgeport, Connecticut.

Leaked surveillance footage showed several people stuffing ballots into Bridgeport's voting drop boxes, leading to allegations of voter fraud.
The alleged ballot-stuffers included allies of Bridgeport's Mayor, Joe Ganim, who won the Democratic primary in September over his rival John Gomes by a narrow margin.
The videotape led a judge to rule that the primary results could not be trusted, ordering another election. The Democrats will re-run their primary.
Mayor Ganim has a controversial history in local politics, having been convicted on racketeering and corruption charges and spent seven years in federal prison before winning back the mayor's office in 2015.
Despite the controversy, experts and political operatives say that the unique circumstances of politics in Bridgeport - rather than grand unified theories of voter fraud - are a much better explanation of recent events.