CREATE TABLE table_18673 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

who are the candidates with district being kansas 4
SELECT "Candidates" FROM table_18673 WHERE "District" = 'Kansas 4'
SELECT "Candidates" FROM "table_18673" WHERE "District" = 'Kansas 4'