Investigative journalist Michael Isikoff reports that an e-mail Sidney Blumenthal sent Hillary Clinton while secretary of State revealed the name of a CIA operator, putting the spy’s life at risk. Appearing Monday on Morning Joe, Isikoff said the e-mail, which Clinton forwarded to one of her State Department colleagues, is “evidence of a commission of a federal crime by somebody,” though not necessarily Clinton. “This is maybe the single most problematic e-mail exchange we’ve seen with Hillary Clinton yet of all the e-mails that have been raised,” Isikoff said. “What you have there is Blumenthal telling the secretary that somebody at the CIA gave the name of a sensitive human intelligence source to somebody who wasn’t at the CIA.”