CREATE TABLE table_18436 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who was the incumbent in the Arkansas 2 district election?
SELECT "Incumbent" FROM table_18436 WHERE "District" = 'Arkansas 2'
SELECT "Incumbent" FROM "table_18436" WHERE "District" = 'Arkansas 2'