CREATE TABLE table_18545 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who was the incumbent in the Illinois 17 district?
SELECT "Incumbent" FROM table_18545 WHERE "District" = 'Illinois 17'
SELECT "Incumbent" FROM "table_18545" WHERE "District" = 'Illinois 17'