Democratic Senate candidate John Fetterman of Pennsylvania said Wednesday that he has agreed to an Oct. 25 televised debate against his Republican rival, Dr. Mehmet Oz, although the men feuded about its terms in what has become a flashpoint in the high-stakes campaign. The debate, coming two weeks before the general election, follows weeks of cajoling by Oz, who has raised questions about the severity of Fetterman’s lingering effects from a May stroke and pushed for as many as seven debates. Fetterman, the state’s lieutenant governor, and Oz, a celebrity heart surgeon endorsed by former President Donald Trump, are vying to replace retiring Republican Sen. Pat Toomey in a race Democrats see as one of their best chances nationally to flip a Republican-held seat.