Last May, when Trump endorsed Oz for the Republican Senate nomination over David McCormick, many of the state's loyal conservatives balked. Dave Ball, the Washington County GOP chairman who flipped his county from blue to red in voter registration, said at the time, “What the hell was he thinking?” When Mastriano surged comfortably ahead in the polls for the GOP gubernatorial nomination in the weeks before the May primary, I reported extensively on the Republicans' fears that Mastriano would drag the party down, including its Senate nominee; within days of that story, Trump endorsed Mastriano.
