Fetterman vows to "keep coming back" against Oz in high-stakes — and only — debate

Pennsylvania's two Senate candidates, Democratic Lt. Governor John Fetterman and his Republican opponent Dr. Mehmet Oz, appeared Tuesday night in their first and only debate in the state's highly-watched and contentious Senate race. 

The debate came as Fetterman continues to recover from a stroke he suffered in May. He struggled at times with speaking due to ongoing auditory processing challenges, and used a closed-captioning device to read the questions. 

In his opening statement, Fetterman, who stumbled several times although it was clear that he understood the questions, acknowledged the "elephant in the room," saying, "I had a stroke." Addressing his opponent, Fetterman said "he is never going to let me forget that."