CREATE TABLE table_1342379_20 (result VARCHAR, candidates VARCHAR)

What was the result of the election featuring james a. gallivan (d) unopposed?
SELECT result FROM table_1342379_20 WHERE candidates = "James A. Gallivan (D) Unopposed"
SELECT "result" FROM "table_1342379_20" WHERE "James A. Gallivan (D) Unopposed" = "candidates"