CREATE TABLE table_203_93 (id DECIMAL, "incumbent" TEXT, "reason for vacancy" TEXT, "appointed successor" TEXT, "date of appointment" TEXT, "elected successor" TEXT, "date of election" TEXT)

who was appointed after dirk kempthorne ?
SELECT "incumbent" FROM table_203_93 WHERE "date of appointment" > (SELECT "date of appointment" FROM table_203_93 WHERE "incumbent" = 'dirk kempthorne') ORDER BY "date of appointment" LIMIT 1
SELECT "incumbent" FROM "table_203_93" WHERE "date of appointment" > (SELECT "date of appointment" FROM "table_203_93" WHERE "incumbent" = 'dirk kempthorne') ORDER BY "date of appointment" NULLS FIRST LIMIT 1