TikTok is, once again, facing an uncertain future. The company has spent the last two years quietly negotiating with US government officials in order to avoid an outright ban. But that process has now stalled, and calls for a ban have only intensified.

Next month, TikTok CEO Shou Zi Chew will testify at a House Energy and Commerce Committee hearing, his first Congressional appearance. Many lawmakers have called for a more sweeping ban, and will likely quiz Chew about TikTok’s alleged risks to national security, and its parent company’s Chinese ownership.