Former Treasury Secretary Steven Mnuchin says he is putting together a group of investors to try to buy TikTok. Mnuchin's announcement comes as Congress votes on a bill that could ban the popular social network in the United States unless Chinese company ByteDance agrees to sell it.

The bill now heads to the Senate, where its future is uncertain, although President Joe Biden has indicated he will sign the legislation if it passes.. “I think the legislation should be passed and I think [TikTok] should be sold,” Mnuchin told CNBC's Squawk Box program.