CREATE TABLE table_18456 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

which affiliation does edwin e. willis affiliate with
SELECT "Party" FROM table_18456 WHERE "Incumbent" = 'Edwin E. Willis'
SELECT "Party" FROM "table_18456" WHERE "Incumbent" = 'Edwin E. Willis'