What party represents the district with john g. jackson?
CREATE TABLE table_2668378_18 (party VARCHAR, incumbent VARCHAR)
SELECT party FROM table_2668378_18 WHERE incumbent = "John G. Jackson"
### Context: CREATE TABLE table_2668378_18 (party VARCHAR, incumbent VARCHAR) ### Question: What party represents the district with john g. jackson? ### Answer: SELECT party FROM table_2668378_18 WHERE incumbent = "John G. Jackson"