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Blake Masters will be the Republican candidate facing off against Arizona Democratic U.S. Sen. Mark Kelly in November in one of the most closely watched races that could determine control of the upper chamber of Congress.
Masters, a former chief operating officer of the investment firm Thiel Capital, won Tuesday’s GOP primary handily, according to a race call by The Associated Press, beating out, among others, businessman Jim Lamon, state Attorney General Mark Brnovich and Michael McGuire, a retired National Guard major general.
