Don’t forget, unions were against involvement in the war when Stalin and Hitler were allied, to the point of sabotaging war production. Midwestern industry and agriculture had a heavy population of German descent and were skeptical of the degree of evil the Germans were engaged in.
A lot of business owners then were isolationist Republicans, so FDR had reason to distrust them too.
Things really were different then.
That's a point I hadn't considered.
Nothing new under the sun.