The first televised debate between a president and his predecessor has been described as the political equivalent of Muhammad Ali and Joe Frazier stepping into the ring to decide which champion reigns supreme. But unlike the two great heavyweight boxers who fought in their physical prime, this month’s bout between President Biden and Donald Trump will be scrutinised for the mental fitness of the oldest men to contest the White House as each tries to land a knockout blow. Biden, 81, will spend up to a week huddled with his advisers before the CNN-hosted debate on June 27, while aides to Trump, 78, insist their man does not need much time to prepare because of his “elite stamina”. It’s all part of the pre-fight
