What party represents the district with incumbent matthew clay?
CREATE TABLE table_2668378_18 (party VARCHAR, incumbent VARCHAR)
SELECT party FROM table_2668378_18 WHERE incumbent = "Matthew Clay"
### Context: CREATE TABLE table_2668378_18 (party VARCHAR, incumbent VARCHAR) ### Question: What party represents the district with incumbent matthew clay? ### Answer: SELECT party FROM table_2668378_18 WHERE incumbent = "Matthew Clay"