WASHINGTON: The Biden administration is under pressure to ban popular Chinese-owned social media app TikTok, but any such move likely hinges on passage of a new law that bolsters the government's authority to regulate speech, experts said. Pressure is mounting from lawmakers and national security hawks to ban TikTok, which is owned by China's ByteDance, over fears the app could censure content, influence users, and pass Americans' personal data to Beijing, allegations the company denies. Courts blocked a prior bid by the Trump administration to ban the app in part on the grounds that such a move violated free speech…