Nelson Mandela THE Elders, a group of prominent former world leaders, voiced concern at U.S. President Donald Trump's refusal to concede electoral defeat, saying it showed disrespect for the integrity of American democracy. The group was founded by late former South African President Nelson Mandela and is now chaired by former Irish President Mary Robinson. It includes Mandela's widow Graca Machel, former U.N. Secretary-General Ban Ki-moon, Nobel Peace Prize-winning former presidents of Colombia and Liberia, and an array of other former world leaders. Former U.S. President Jimmy Carter is an emeritus member. Trump's position was "putting at risk the functioning…