I would think Fetterman's absence would be enough to make folks question about what would happen if he was elected.

"Pennsylvania Senate candidate Dr. Mehmet Oz is criticizing his Democratic opponent, Lieutenant Governor John Fetterman, for his prolonged absence from the campaign trail and publicly questioning whether he is healthy enough to serve as senator for the state.
“I’ve officially committed to 5 moderated debates across Pennsylvania,” Oz wrote. “Fetterman has agreed to 0. It’s time for Fetterman to show up. Pennsylvanians deserve to hear from their candidates.”

https://capitalhillnews.com/oz....-questions-senate-op