Former Vice President Mike Pence by no means mentioned Donald J. Trump’s title. In 21 minutes on the Iowa State Fair soapbox on Thursday, Mr. Pence referred to Mr. Trump as “my former running mate” and “the former president” however made no reference to something that occurred throughout what he often calls “the Trump-Pence administration.”

Mr. Pence prevented these references even when a voter within the crowd — a supporter of President Biden — accused him of getting dedicated “treason” on Jan. 6 in a query, eliciting boos from an in any other case respectful crowd.

“I know you might have a different impression about what my duties and responsibilities were on Jan. 6, and I’m happy to talk to you about it,” Mr. Pence mentioned.

What he didn’t know was that the person who had shouted the query at him was a retired postal inspector who had traveled from Colorado for a little bit of political efficiency artwork.

“I want Pence to have to explain himself at every event,” the Democratic heckler, David Stelzer, mentioned afterward. “He spent two years quiet and allowed this thing to fester, this disease, this cancer, to fester, and that’s why we’re in the case were in.”

Mr. Stelzer added: “He’s not going to win the nomination and he’s not going to go down in the history books as a courageous leader.”

Mr. Pence, who often will get comparable questions from fellow Republicans, took the query in stride.

“There’s almost no idea more un-American than the notion that any one person could pick the American president,” Mr. Pence mentioned. “People deserve to know that on that day, the former president asked me to choose between him and the Constitution. I chose the Constitution and I always will.”