CREATE TABLE table_name_48 (first_elected NUMBER, party VARCHAR2, district VARCHAR2)

What is the highest First Elected, when Party is 'Republican', and when District is 'Louisiana 7'?
SELECT MAX(first_elected) FROM table_name_48 WHERE party = "republican" AND district = "louisiana 7"
SELECT MAX("first_elected") FROM "table_name_48" WHERE "district" = "louisiana 7" AND "party" = "republican"