CREATE TABLE table_19303 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" TEXT, "Result" TEXT, "Candidates" TEXT)

Who was the incumbent in the Ohio 16 district?
SELECT "Incumbent" FROM table_19303 WHERE "District" = 'Ohio 16'
SELECT "Incumbent" FROM "table_19303" WHERE "District" = 'Ohio 16'