First, there were widespread reports that party affiliations were being mysteriously switched in the state of NY. If you are registered as an independent (which a lot of affiliations were switched to), you cannot vote in the state primary elections (closed primaries). If your affiliation was recently switched (past the deadline of sometime last year), you are ineligible in the primary elections as well.
And now, this interesting wrinkle comes up.
So, it seems that voter suppression is a real thing, and it isn't just a republican thing either.http://www.boomantribune.com/story/2016/4/14/141955/280