Sinn Fein’s Conor Murphy, left, party leader Mary Lou McDonald, center, and Michelle O’Neill speak to the media at Hillsborough Castle, Northern Ireland, Monday, May, 16, 2022. British Prime Minister Johnson said there would be “a necessity to act” if the EU doesn’t agree to overhaul post-Brexit trade rules that he says are destabilizing Northern Ireland’s delicate political balance. Johnson was holding private talks with the leaders of Northern Ireland’s main political parties, urging them to get back to work. (AP Photo/Peter Morrison)