WASHINGTON (Reuters) - Two Democratic lawmakers on Monday urged Congress and President Joe Biden to extend a Jan. 19 deadline for China-based ByteDance to sell the U.S. assets of TikTok or face a U.S. ban.

The Supreme Court held arguments Friday on Tiktok and ByteDance's challenge to the law. A lawyer for the companies, Noel Francisco, said it would be impossible to complete a sale by then of the short video app used by 170 million Americans and said the site would quickly go dark and "essentially the platform shuts down."