Despite It All, Can Blake Masters Win?

In early September, Blake Masters’ campaign looked doomed. Arizona’s Republican Senate hopeful was struggling to make up ground against Democratic Sen. Mark Kelly in the polls, buried under a barrage of negative ads and lacking the campaign funds to hit back. And when a prominent Republican super PAC affiliated with Senate Minority Leader Mitch McConnell announced in late September it was cutting bait to focus its spending on other states, it felt like Masters’ epitaph.

But now a perfect storm of circumstance has buoyed Masters’ campaign, and Kelly’s once-comfortable six-point...