Under Mark Brnovich, a Republican who left office in January, a 10,000-hour review did not see the light of day. His Democratic successor, Kris Mayes, released investigators’ findings.
As they worked to hold the chamber, Democratic strategists used subtle maneuvers to try to discourage strong potential Republican candidates from running.
Mr. Kelly, who ran as a bipartisan legislator devoted to the needs of Arizona, defeated Blake Masters, a Republican newcomer whose ideological fervor failed to win over enough independent voters.