Smedly Butler in a congressional hearing claimed that a man came to him saying that he represented several powerful/rich people within the United States.  This man said that they wanted Smedley to lead a coup against FDR.  Because the New Deal was communism and they weren't going to stand for it. Ol Smed told them to F Off.   
You can read more about it here: https://en.wikipedia.org/wiki/Business_Plot