CREATE TABLE table_18622 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

what are all the district with incumbent being sam hobbs
SELECT "District" FROM table_18622 WHERE "Incumbent" = 'Sam Hobbs'
SELECT "District" FROM "table_18622" WHERE "Incumbent" = 'Sam Hobbs'