Steven Mnuchin, the former US Treasury Secretary, said he’s still interested in buying TikTok’s US operation from its Chinese owner, and believes the social media app’s critical video recommendation technology could be replicated. “I’ve actually spoken to a lot of tech companies on working about rebuilding this,” Mnuchin said Tuesday in an interview with Bloomberg Television. “I do believe the algorithms could be rebuilt. So my plan, if we were to purchase, it would be to rebuild the...