On August 24, backers of the initiative in Arizona for a top-two open primary filed a lawsuit in state court, alleging that the petition does have enough valid signatures. See this story. UPDATE: opponents of the initiative have also filed a lawsuit, alleging that many of the signatures accepted by elections officials should be rejected, because they were collected by ex-felons. See this story.
They are also challenging the sampling procedure used in Arizona, which unlike in California does not have a full count check after the initial sample check.
The Arizona Constitution sets the 15% standard for signatures for constitutional amendments, but the statutes do not provide for making an full sample check.
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