Mr. Fetterman, 52, said he has “no physical limits,” walks 4 to 5 miles every day in 90-degree heat, understands words properly and hasn’t lost any of his memory. He struggles with hearing sometimes, he said, and may “miss a word” or “slur two together,” but he said it doesn’t happen often and that he’s working with a speech therapist…

“I might miss a word every now and then in a conversation, or I might slur two words. Even then, I think that’s infrequent,” Mr. Fetterman continued, “So I feel like we are ready to run, and that’s the only issues I have. That’s the absolute truth, 100%.”

In the Wednesday morning interview, Mr. Fetterman used closed captioning on the call to make sure he didn’t miss any words, his campaign spokesman said afterward — information that was disclosed at Mr. Fetterman’s urging for the “sake of being totally transparent,” he said. The Post-Gazette was given a 20-minute time frame to conduct the interview.