The president says he's is working with "four different groups" on a TikTok purchase. Here's who has expressed interest in the past.

If a U.S. company buys TikTok, it could mean we’re all safe to keep using the app after April 5. At this point its not clear what constitutes a sale, however.

With an April 5 deadline looming, TikTok could be sold, banned again, or given another extension. Here’s what’s at stake.