Cynthia Littleton Business Editor“Saturday Night Live” once again zeroed in on the war in Ukraine in its cold open with a sketch that featured President Joe Biden and White House press secretary Jen Psaki consulting with TikTok stars on how to respond to the growing threat from Russia.James Austin Johnson was back in an Oval Office setting as Biden while Kate McKinnon limned Psaki. A clutch of six representative TikTok personalities were seated on the two divans in the familiar setting for presidential meetings.“I suggested it as a joke and then it actually happened,” McKinnon as Psaki quipped, looking around the room.Johnson’s Biden joked about his lack of familiarity with the cutting-edge of social media.