Great national convention: one great issue; must preserve great democratic tradition; why Henry A. Wallace left Republican Party; true attitude of Republican Party toward agriculture; "most of the Republican candidates will be traipsing around the place dressed like Little Red Riding Hood's grandma-- we shall have to look closely to see the long teeth"; still trying to smoke them out; "next fall the voters will determine whether the farm program will be improved by its friends or scuttled by its enemies"; clarion call for year's campaign