CREATE TABLE "united_states_house_of_representatives_e" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);

Question: How many of the first elected were listed when Hatton W. Sumners was incumbent and re-elected?
SQL: SELECT COUNT("first_elected") FROM "united_states_house_of_representatives_e" WHERE "result"='Re-elected' AND "incumbent"='Hatton W. Sumners';