Three methods discussed in this video about what happened in California.

[JDPriestly]

30. Since the election, I personally, have talked to three people whose registrations were not

correctly listed when they went to the polls. Two of them had voted Democratic all their lives and were shown as some other party. One, my neighbor, re-registered Democratic from Peace and Freedom well prior to the election specifically to vote for Bernie and was not registered as a Democrat according to the records at the polls. She had to vote by provisional ballot although she is sure she re-registered as a Democrat well before the primary.

And those are just cases of people I personally know. In addition, I was at the polling place near my neighborhood and saw this happening. The voting rolls were not properly updated. It was a mess.

It really looks bad for the Democratic Party in California. It makes the organization and the Recorders' offices look incompetent or sloppy or perhaps worse.