Today 's top presidential candidates weigh in on what makes a president great . John McCain : FDR was the greatest president of the 20th century . H.W . Brands : This will satisfy some people and astonish others . '' America is not ready for another great president right now . Joan Hoff : Wartime presidents tend to be considered great , but perhaps no longer .
Today 's top presidential candidates weigh in on what makes a president great . John McCain : FDR was the greatest president of the 20th century . H.W . Brands : America is not ready for another great president right now . Joan Hoff : Wartime presidents tend to be considered great , but perhaps no longer .