America 's top presidential scholars weigh in on what makes a president great . Richard Reeves : FDR was the greatest president of the 20th century . H.W . The Man Who Saved the Union : Ulysses Grant in War and Peace . '' Brands : America is not ready for another great president right now . Joan Hoff : The presidency has become too much about charisma and image, rather than substance.
America 's top presidential scholars weigh in on what makes a president great . Richard Reeves : FDR was the greatest president of the 20th century . H.W . Brands : America is not ready for another great president right now . Joan Hoff : The presidency has become too much about charisma and image, rather than substance.