"This is my last election. After my election I have more flexibility."
At the 2012 Nuclear Security Summit in Seoul, Obama leaned in to Medvedev for what he believed was a private sidebar. He told Medvedev that on missile defense specifically — the most contentious active dispute between Washington and Moscow — he needed Putin to give him 'space' until after the election. Medvedev confirmed he'd pass it directly to Vladimir.
Covered for roughly 72 hours as an embarrassing gaffe. Obama's team said he was simply noting that arms control negotiations require more time — a clarification the press accepted. Four years later, when the Trump-Russia narrative became dominant, no major outlet ran a serious comparative piece examining Obama's hot-mic promise to transmit secret concessions to Vladimir Putin through his surrogate.
Obama told the president of Russia — privately, before an election — that his public position was not his real position, and the real position would emerge once democratic accountability was behind him. The press treated it as a slip. The same press corps spent the following four years treating any suggestion of private Trump-Russia communication as the story of the decade.