Does this increase the likelihood of shenanigans?

A:

There is no data to back up that argument. These measures comply with the law and are modeled after what’s being done in a majority of states. Increased turnout is more likely to limit shenanigans than systems that limit participation. We are opening primaries to unaffiliateds, but are not changing the rules on how far in advance Rs and Ds must change affiliation (22 days) to participate in the other’s primary.