Why did roosevelt's republican challenger alfred landon fail in his bid for the presidency in 1936?

The failure of Alfred Landon's bid for the presidency in 1936 is often attributed to a combination of FDR's popularity, and Landon's perceived lacklustre participation in the campaign. Landon failed to participate in the Republican primaries, and was apparently unwilling to travel far afield to make campaign appearances, for which he was lampooned in contemporary media.

As Elizabeth Eckford, I was discriminated on my first morning of school.  I prepared what I wore the night before and then the next day I got yelled at someone who doesn’t want me to go to school. I am a victim of discrimination. The integration was not the way I expected it to be.  I felt mistreated by almost everyone and I felt very disappointed with how they stared at me.