Pennsylvania Lt. Gov. John Fetterman’s campaign said Wednesday it raised more than $1 million in just three hours following the Democratic Senate candidate’s debate with his Republican rival, Dr. Mehmet Oz. The “unprecedented” haul demonstrates “deep grassroots enthusiasm” for Fetterman, his campaign said. The sole faceoff between Fetterman, the progressive former Braddock mayor, and Oz, the celebrity doctor backed by former President Donald Trump, marked the climax of one of the most important races of the Nov. 8 midterm elections. It also put a spotlight on Fetterman’s continued struggles after he suffered a life-threatening stroke in May that took him...