 Anchor George Stephanopoulos. President Joe Biden defended his choice to run for a second presidential term at the age of 81. While he acknowledged last week's debate was not his best moment, he explained he was proud of his accomplishments in the administration, but Stephanopoulos pressed the president and clarified his question on the mental and emotional toll of the presidency. All that takes a toll. Do you have the mental and physical capacity to do it for another four years?