TikTok had hardly any friends in the U.S. government when, earlier this year, the Biden administration and Congress threatened to ban the Chinese-owned video giant. WSJ’s Stu Woo profiles financier Jeff Yass, who made a big bet on the app and is a top donor to lawmakers opposing a ban.   Further Listening: - What’s Up With All the TikTok Bans?  - Exclusive: TikTok’s CEO on the App’s Future in the U.S.  - How TikTok Became the World’s Favorite App  Further Reading: - The Billionaire Keeping TikTok on Your Phone  Learn more about your ad choices. Visit megaphone.fm/adchoices