By Ashley Parker, Carol D. Leonnig, Philip Rucker and Tom Hamburger, The Washington Post On the sidelines of the Group of 20 summit in Germany last month, President Donald 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. The strategy, the advisers agreed, should be for Donald Trump Jr.