It was not the craziest election of the 20th Century, but it might have been the strangest.

One candidate was a natural politician, affable and gregarious, a true man-of-the-people who favored flashy suits and a trademark derby hat. Reporters loved him and admirers thronged his events.

The other contender could easily be classified a misanthrope. He was a miserable public speaker who hated crowds and disdained the campaign regimen of shaking hands and kissing babies. For months, even after secretly directing his …