Meta CEO Mark Zuckerberg emphasized Wednesday that his social media company faces stiff competition from TikTok, as Meta seeks to fend off accusations from the Federal Trade Commission (FTC) that it has a monopoly over social networking. Zuckerberg, who has spent three days on the stand, said he considers TikTok the “highest competitive threat” for Facebook and Instagram in the past few years. Meta’s lead attorney, Mark Hansen, pointed to a 2020 email from former Facebook executive Vijaye Raji, ...