US President Donald Trump says he is preparing to legally challenge the counting of mail and absentee votes after a Supreme Court decision. Mr Trump said: "I think it's terrible when we can't know the results of an election the night of the election in a modern-day age of computer. I think it's a terrible thing. And I happen to think it was a terrible decision for our country made by the Supreme Court. "Now, I don't know if that's going to be changed, because we're going to go in the night of - as soon as that election's over - we're going in with our lawyers."