By Tobias Carroll The idea that President Biden would host a briefing for a number of prominent TikTok personalities can sounds surreal at first glance. On last night’s Saturday Night Live, the cold open was a comic riff on this very real event — and, when the opening narration featured the phrase “a national security briefing with some of the nation’s top TikTok creators,” you can hear muted laughter. That continues into the sketch itself, with Kate McKinnon’s Jen Psaki revealing that she suggested the meeting as a joke and James Austin Johnson’s Joe Biden dubbing himself “the land line of pr…