What we have in common matters more than what divides us. We must build our country on that, says late Jo Cox’s husband

TODAY would have been my wife’s 52nd birthday. But ten years ago, she was murdered in the street by a neo-Nazi. That murder shocked the nation, and it devastated our family. Telling my kids that their mum had been killed (they were three and five at the time) was the hardest thing I have ever...