Mr. Dimos did not respond to a request for comment. Carol Stevens, an A.B.A. spokeswoman and a former managing editor of USA Today, said the association had only minor and routine objections to the article’s tone.

“We thought it was an insightful article, and we asked them to consider minor edits,” she said.

George Freeman, a third former chairman of the forum, disputed that characterization.

“I don’t think it’s fair to say ‘minor edits,’ ” he said. “Among the edits they wanted to make were the title and the lede,” he said, using newspaper jargon for the article’s opening passage.

The article was titled “Donald J. Trump Is a Libel Bully but Also a Libel Loser.” The bar association’s proposed title was “Presidential Election Demonstrates Need for Anti-Slapp Laws.” The acronym stands for Strategic Lawsuits Against Public Participation. In states with such laws, defendants can sometimes seek early dismissal of libel and similar suits and recover their legal fees.

Mr. Freeman, a former lawyer at The New York Times Company, is executive director of the Media Law Resource Center, a trade association of law firms and media companies. On Friday, the center posted the report on its site.

Ms. Stevens, the bar association spokeswoman, emphatically denied that the fear of a libel suit had played any role in the association’s objections. Ms. Stevens declined to comment when she was read passages from Mr. Dimos’s email. “I’m not a lawyer,” she said, “and that wasn’t my fear.”

Presented with the email, which indicated that she had received it at the time, she pointed to a passage in it that raised another criticism of the study. “Mr. Dimos’s primary concern was the use of partisan language,” Ms. Stevens said. “By policy, the A.B.A. is strictly nonpartisan.”