Gates also said the campaign believed that Michael Flynn, who later became Trump's first national security adviser, would be in the best position to obtain Hillary Clinton's missing emails because of his Russia connections. Flynn said he could use his intelligence sources to obtain the emails and was "adamant that Russians did not carry out the hack" because he believed that the U.S. intelligence community couldn't have figured out the source, according to the agent's notes. Flynn later pleaded guilty to lying to the FBI about his contacts with the Russian ambassador.