Republican Senate candidate Dr. Mehmet Oz teamed up with U.S. Sen. Pat Toomey on Tuesday to publicly call on his Democratic rival, John Fetterman, to participate in a debate in their high-profile Pennsylvania race. Oz and Toomey, holding a news conference in Philadelphia, also questioned Fetterman’s fitness for office and criticized his reluctance to speak with reporters since suffering a stroke in May. Fetterman has been sidelined for most of the summer while recovering, though he did appear Monday with President Joe Biden at a Labor Day parade in Pittsburgh and has spoken briefly at a number of events.