The United States has told China-based ByteDance to sell its shares on the TikTok app or risk a national ban, the Wall Street Journal reported on Wednesday.Western powers, including the European Union and the United States, have been taking an increasingly tough approach to the app, citing fears user data could be used or abused by Chinese officials.The concern here ramped up earlier this year after a Chinese spy balloon was shot down in US airspace.The White House last week welcomed a bill that would allow President Joe Biden to ban TikTok, US National Security Advisor Jake Sullivan said in a statement.A bipartisan bill “would empower the United States government to prevent certain foreign governments from exploiting technology services… in a way that poses risks to Americans’ sensitive data and our national security,” Sullivan said.The Senate bill and the backing of the White House accelerated the political momentum against TikTok, which is also the target of a separate piece of legislation in the US House of Representatives.Appearing tough on China is one of the rare issues with potential for bipartisan support in both the Republican-run House and the Senate, where Biden’s Democratic Party holds a majority.TikTok claims it has more than a billion users worldwide including over 100 million in the US, where it has become a cultural force, especially for young people.