UPDATED 9.05AM | President Donald Trump on Sunday briefly acknowledged losing the US election in a morning Twitter post but then backtracked, saying he concedes "nothing" and vowing to keep up a court fight that election-law experts say is unlikely to succeed.

President-elect Joe Biden focused on the coronavirus pandemic, setting meetings with vaccine developers as the crisis intensifies. The number of US coronavirus cases passed 11 million on Sunday, a million more new cases than a week ago and the fastest increase since the pandemic began...