good reason to be VERY concerned. Very. It is simple:
If Mr. Fetterman is not well enough to debate his opponent, that raises serious concerns about his ability to serve as a United States senator.
… That said, Mr. Oz has raised legitimate concerns. If Mr. Fetterman’s communication skills have not yet recovered sufficiently to effectively debate his opponent, many voters will have concerns about his ability to represent them effectively in Washington. While he has gamely undertaken more campaign events and media interviews in recent weeks, Mr. Fetterman still speaks haltingly and relies on closed captioning to fully understand his conversation partners.
… Voters have a right to know whether their prospective senator can do the job — including handling the give-and-take of a vigorous debate.