 A reminder of our top story this hour, Joe Biden has promised a swift and thorough investigation into the assassination attempt on Donald Trump. He's also promised an independent review of security at the rally in Pennsylvania, where a gunman opened fire on Saturday. Donald Trump has called for unity. So what impact might this have on the election? Speaking on this programme, Tim Burchett, who's a Republican congressman from Tennessee, said he thought support for Donald Trump would skyrocket.