How could anyone seduce the President of the United States wearing oxfords, long printed frocks and spinster cardigan sweaters? Even if said President was crippled by polio and the year is 1939.  Yet Margaret “Daisy” Suckley (Laura Linney) dressed thusly, and became Franklin Delano Roosevelt’s (Bill Murray) intimate confident and companion during a major portion of his life. Daisy being 5th cousin to the Roosevelt family and the only relative available one summer afternoon; was called on by FDR’s mother to come make a visit to Hyde Park, her home in Upper State New York, to which her son, The President, often used as an extension to The White House.…