In this Nov. 6, 2018, file photo, then-Arizona Republican senatorial candidate Martha McSally speaks with voters at Chase's diner in Chandler, Ariz. A Phoenix-area businessman says he will challenge McSally in next year's Republican primary. Daniel McCarthy told The Associated Press on Wednesday, Aug. 28, 2019, that Congress needs "conservative outsiders to step in and push back quickly." His challenge could pose a serious threat to McSally, who was appointed to finish John McCain's Senate term. (AP Photo/Matt York, File)
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