CREATE TABLE table_18304 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What was the incumbent for missouri 1?
SELECT "Incumbent" FROM table_18304 WHERE "District" = 'Missouri 1'
SELECT "Incumbent" FROM "table_18304" WHERE "District" = 'Missouri 1'