From Politico: BuzzFeed reporter McKay Coppins was picked up on a hot-mic at today’s Mitt Romney event in Kettering, Ohio, saying there was “at least a 40-percent chance” that the candidate would “say something stupid.” The remark, picked up on a pool feed, drew some attention among other reporters on Twitter, but Coppins was quick to run damage control: “Looks like my snide comment, caught on livestream, was wrong,” he tweeted. “Romney got the tone just right at this event in Dayton.”
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Notice at the 3:00 mark when the Politico reporter tells those around him that his mic is hot and not to “say anything silly” around him.