U.S. President-elect Donald Trump said Saturday he would “most likely” give TikTok a 90-day reprieve from a potential ban after he takes office Monday, as the app with 170 million American users buzzed with nervous anticipation ahead of a shutdown set for Sunday. “The 90-day extension is something that will be most likely done, because it’s appropriate,” Trump told NBC in an interview. “If I decide to do that, I’ll probably announce it on Monday.” The Chinese-owned app, which has captivated nearly half of all Americans, powered small businesses, and shaped online culture, said Friday it will go dark in