In what district was the incumbent Edwin Gray? 
CREATE TABLE table_2668401_17 (district VARCHAR, incumbent VARCHAR)
SELECT district FROM table_2668401_17 WHERE incumbent = "Edwin Gray"
### Context: CREATE TABLE table_2668401_17 (district VARCHAR, incumbent VARCHAR) ### Question: In what district was the incumbent Edwin Gray?  ### Answer: SELECT district FROM table_2668401_17 WHERE incumbent = "Edwin Gray"