Hillary Clinton recklessly discussed, in emails hosted on her private server, an Iranian nuclear scientist who was executed by Iran for treason, Sen. Tom Cotton, R-Ark., said Sunday.

“I’m not going to comment on what he may or may not have done for the United States government, but in the emails that were on Hillary Clinton’s private server, there were conversations among her senior advisors about this gentleman,” he said on “Face the Nation.” Cotton was speaking about Shahram Amiri, who gave information to the U.S. about Iran’s nuclear program.