Washington: US President Joe Biden on Friday said he would sign legislation that would give China’s ByteDance company a time period of six months to divest the popular TikTok short video app as his Republican rival Donald Trump raised concerns about a ban on the service that is used by a massive 170 million Americans. Lawmakers are pushing to block the app’s Chinese owners over purported national security risks.Washington: US President Joe Biden on Friday said he would sign legislation that would give China’s ByteDance company a time period of six months to divest the popular TikTok short video app as his Republican rival Donald Trump raised concerns about a ban on the service that is used by a massive 170 million Americans. Lawmakers are pushing to block the app’s Chinese owners over purported national security risks.