This one will be decided in court. Here’s to hoping the AZGOP has some good lawyers. https://www.usnews.com/news/politics/articles/2018-11-08/arizona-gop-sues-to-change-how-mail-in-ballots-are-counted-in-sinema-mcsally-race
Oops. Corrected link https://www.azfamily.com/read-the-maricopa-county-republican-party-complaint/pdf_2a032ad2-e312-11e8-856f-9fe87c3abc61.html