The dust bowl moving eastward. A lot of poor people lived in the W. and all the middle class lived in the East. Once the bowl moved E. it really screwed the middle class over worst than the poor because they didn't know what to do when that happened.
It was primarily an anti-Catholic, anti-immigration, populist and xenophobic. So they were against immigration.
The answer is Colonel Edward House
I dont think it would be like it is today