Question: How many districts represented Edwin E. Willis?
SQL: SELECT COUNT("District") FROM "1-1341884-20" WHERE "Incumbent" = 'Edwin E. Willis';

Question: Who were all the candidates when the first elected year was 1961?
SQL: SELECT "Candidates" FROM "1-1341884-20" WHERE "First elected" = 1961.0;

Question: What party did Hale Boggs belong to?
SQL: SELECT "Party" FROM "1-1341884-20" WHERE "Incumbent" = 'Hale Boggs';