With the media focused on Donald Trump’s self-abasing performance in Helsinki, a key detail of the president’s summit with Vladimir Putin got lost in the noise. Putin, Trump said on Monday, had extended him an “incredible offer”: to let Robert Mueller’s team fly to Moscow to meet with the Kremlin’s own investigators to get to the bottom of the 2016 election hacking. The offer was, of course, patently absurd—laughable, even, except that Trump seemed so excited by it. Putin, however, was deadly serious. Although his own comments at the joint press conference were not covered as feverishly, the Russian president laid out exactly what he intended by the offer: a devil’s bargain that no American president other than Trump would ever entertain.