President Donald Trump has for a second time extended the deadline that would have required TikTok to be sold or face a ban in the US. A bipartisan law passed by Congress last year mandates TikTok's Chinese parent company, ByteDance, sell the app. The platform 'went dark' for a day in January in the US after the law took effect, until Trump intervened and delayed the ban until 5 April. He has now granted a another 75-day extension until June broker a deal. The US government has said TikTok poses a threat to national security because Chinese authorities might access…