CREATE TABLE table_18367 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Which incumbent was first elected in 1964?
SELECT "Incumbent" FROM table_18367 WHERE "First elected" = '1964'
SELECT "Incumbent" FROM "table_18367" WHERE "First elected" = '1964'