United States Senate Washington, D.C. Sept. 17, 1940. My Dear Mother: It was fine to visit with you Sunday. I had a perfectly comfortable flight to Washington that night. Since then I have been working in high gear to get ready to debate the question pending relating to immunity of State and Municipal bonds from Federal taxation.  It is a dangerous thing to act as if the Fed. government had supremacy in the field of taxation and could injure or destroy the necessary function of the states to finance their own government. I was impressed by your apparent good health and good cheer. Best love, Warren. As usual the beans spoke for themselves.  They are excellent.  Sadie will warm them up to preserve them for me.