The results of the US Election have been called across the world, announcing Joe Biden officially as President-Elect. However, President Donald Trump has so far refused to concede, insisting that various attempts at electoral fraud have changed the outcome of the vote - he says he can prove it in court. Carol Laham is a constitutional lawyer and political campaigns expert, she spoke with Andy Bell from her home in Chevy Chase, explaining on what grounds Donald Trump could bring a case.