text:  President Biden, meanwhile, aimed to clear a fresh hurdle in the form of a one-on-one interview with ABC's George Stephanopoulos airing this evening. Biden's campaign says it's pairing his in-person events with a new $50 million ad campaign this month. Lawyers for Elon Musk are asking a federal judge to dismiss a lawsuit brought by former Twitter shareholders. As NPR's Bobby Allen explains, Musk denies he duped investors in his acquisition of the social media site.