Crocker was also highly critical of Roosevelt's 1940 Republican opponent, Wendell Willkie, a former Democrat. After Willkie's defeat, Crocker wrote:
The flighty Wendell Willkie ... suddenly 'got religion' and became an ebullient emissary for Roosevelt, traveling to London, Moscow, and Chungking in an Army transport plane, emotionally overcome by his precipitate arrival in the upper regions of international fame. His much publicized slogan 'One World', served well to cover up the real state of affairs. ... Whether other Republican leaders, such as Hoover and Taft, and dissident Democrats ... looked upon these antics of Wendell Willkie as those of an opportunistic hypocrite or an impressionable dupe, we know not. They [Hoover and Taft] themselves had no hallucinations about a 'grand coalition of peoples, fighting a common war of liberation.'