CREATE TABLE table_18690 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

To which party does Riley Joseph Wilson belong?
SELECT "Party" FROM table_18690 WHERE "Incumbent" = 'Riley Joseph Wilson'
SELECT "Party" FROM "table_18690" WHERE "Incumbent" = 'Riley Joseph Wilson'