CREATE TABLE table_18363 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What republican candidate was first elected most recently?
SELECT MAX("First elected") FROM table_18363 WHERE "Party" = 'Republican'
SELECT MAX("First elected") FROM "table_18363" WHERE "Party" = 'Republican'