In what district was incumbent first elected in 1938? 
CREATE TABLE table_1342013_42 (district VARCHAR, first_elected VARCHAR)
SELECT district FROM table_1342013_42 WHERE first_elected = 1938
### Context: CREATE TABLE table_1342013_42 (district VARCHAR, first_elected VARCHAR) ### Question: In what district was incumbent first elected in 1938?  ### Answer: SELECT district FROM table_1342013_42 WHERE first_elected = 1938