TikTok is facing an existential crisis in America. If its Chinese owner fails to sell the app in the next year or so, it could be banned in its biggest market.

Not only would that deal another huge blow to China’s tech ambitions, it would further deepen the divide between two digital worlds centered around the rival economic superpowers.

Congress on Tuesday approved legislation that could compel ByteDance to sell TikTok or face a national ban. President Joe Biden is expected to sign the bill into law on Wednesday; TikTok has already said it will challenge the law in court.

Beijing has previously said it strongly opposes a forced sale of TikTok, and it has revised its export control rules to give it the power to block a sale on national security grounds. That leaves few options for ByteDance to secure the future of TikTok in the US, its biggest market with 170 million users.