Who was the best US president? The worst? Biographer Robert Merry plays "rate the presidents" based on popularity and historical judgment. Here are some hints: Abraham Lincoln's at the top and James Buchanan ranks as one of the country's biggest failures.
Presidential Popularity Contests With Robert Merry
![Where They Stand](https://npr.brightspotcdn.com/dims4/default/636f6f3/2147483647/strip/true/crop/200x300+0+0/resize/880x1320!/quality/90/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2Flegacy%2Fsites%2Fkuow%2Ffiles%2F201210%2Frobertmerry.jpg)
(Credit/Simon & Schuster)