On the sidelines of the Group of 20 summit in Germany last month, President Trump’s advisers discussed how to respond to a new revelation that Trump’s oldest son had met with a Russian lawyer during the 2016 campaign — a disclosure the advisers knew carried political and potentially legal peril. . . .

Flying home from Germany on July 8 aboard Air Force One, Trump personally dictated a statement in which [Donald] Trump Jr. said that he and the Russian lawyer had “primarily discussed a program about the adoption of Russian children” when they met in June 2016, according to multiple people with knowledge of the deliberations. The statement, issued to the New York Times as it prepared an article, emphasized that the subject of the meeting was “not a campaign issue at the time.”