Masha Gessen and Keith Gessen have, taken together, written more than a dozen books and a thousand articles. Keith Gessen is a founder of n+1, an influential literary journal; Masha has written for major newspapers and journals as well as, since 2014, The New Yorker. Their parents emigrated from the Soviet Union in its latter days. Keith has spent most of his life in America, but Masha, who is older, returned to Russia as an adult and worked there as a reporter. In a conversation at the 2018 New Yorker Festival, the siblings discussed their different perspectives on the U.S.-Russia relationship. All through the Mueller investigation, Masha warned people not to expect a smoking gun to prove collusion between Putin and Trump, and then, somehow, this fierce critic of Putin was branded an apologist for his regime. Masha’s most recent book is “The Future Is History”; Keith’s is a novel, called “A Terrible Country.”