“Speaker Mike Johnson is about to confront one of his biggest leadership tests yet, courtesy of voters in southwest Arizona,” Politico reports.“They are highly likely to elect a new Democratic House member in a special election Tuesday. That would-be lawmaker, Adelita Grijalva, told Politico she plans to become the 218th and clinching supporter of a bipartisan effort to force public disclosure of federal investigative files related to the late sex offender Jeffrey Epstein.”