CREATE TABLE table_765 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What district was Harold Earthman the incumbent in?
SELECT "District" FROM table_765 WHERE "Incumbent" = 'Harold Earthman'
SELECT "District" FROM "table_765" WHERE "Incumbent" = 'Harold Earthman'