Counting of votes in the US stretched into the second morning as Joe Biden eyes a win. His best-case scenario is to win just two states - Nevada and Arizona and win the Presidency. But Donald Trump's biggest fight back is the state which he must win to have a fighting chance - Pennsylvania. With its 20 electoral votes it will give him a much-needed boost to get to the 270 mark. Trump has today threatened more legal challenges over results from a handful of states, claiming that voter fraud has been committed in places where Joe Biden appears to have won.