CREATE TABLE table_1342149_18 (party VARCHAR2, result VARCHAR2, district VARCHAR2)

What party's candidate was re-elected in the Louisiana 6 district?
SELECT party FROM table_1342149_18 WHERE result = "Re-elected" AND district = "Louisiana 6"
SELECT "party" FROM "table_1342149_18" WHERE "Louisiana 6" = "district" AND "Re-elected" = "result"