CREATE TABLE table_18467 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Who is the incumbent in the Alabama 6 voting district?
SELECT "Incumbent" FROM table_18467 WHERE "District" = 'Alabama 6'
SELECT "Incumbent" FROM "table_18467" WHERE "District" = 'Alabama 6'