CREATE TABLE table_18365 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

What party did the incumbent from the Illinois 12 district belong to?
SELECT "Party" FROM table_18365 WHERE "District" = 'Illinois 12'
SELECT "Party" FROM "table_18365" WHERE "District" = 'Illinois 12'