But the video does not show how the reporters identified themselves and reflects only snippets of the reporters’ conversations with Mr. Benton, making it difficult to verify exactly what Mr. Benton had offered or whether any laws were broken.

Mr. Benton stopped formally working for the super PAC last spring, after his conviction in the endorsement-buying scheme. Dan Backer, a lawyer for Great America, suggested that Mr. Benton had exaggerated his ties to the super PAC and said that Mr. Benton had no authority to solicit contributions.

“I think it’s pretty clear that someone who used to work for the organization decided to leverage that former relationship for his own purposes,” Mr. Backer said. “We did not take, we did not solicit, we did not accept any foreign contributions directly or indirectly.”

Mr. Backer acknowledged that the undercover reporters first contacted Eric Beach, the PAC’s co-chairman, who referred them to Mr. Benton. But Mr. Backer said it was for Mr. Benton to advise the supposed donors on legal activities they could conduct in the United States.