CREATE TABLE table_18400 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who was the candidate when the incumbent was Richard C. White?
SELECT "Candidates" FROM table_18400 WHERE "Incumbent" = 'Richard C. White'
SELECT "Candidates" FROM "table_18400" WHERE "Incumbent" = 'Richard C. White'