The CEO of investment firm General Atlantic, a board member of TikTok's parent company, said on Thursday that he was optimistic that a deal to keep the short-video app operating in the United States would be agreed.

An executive order is an instruction from the president which has the weight of the law behind it. But Trump's order does not overturn the ban. Instead it tells the US attorney general not to enforce the law for now - something experts had expected would be his first move.