Which incumbent was first elected in 1964? 
CREATE TABLE table_1341707_15 (incumbent VARCHAR, first_elected VARCHAR)
SELECT incumbent FROM table_1341707_15 WHERE first_elected = "1964"
### Context: CREATE TABLE table_1341707_15 (incumbent VARCHAR, first_elected VARCHAR) ### Question: Which incumbent was first elected in 1964?  ### Answer: SELECT incumbent FROM table_1341707_15 WHERE first_elected = "1964"