CREATE TABLE table_73397 ("State  ( class ) " TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date of successors formal installation" TEXT)

What are all the states (class) when the successor was Joseph Anderson ( DR )?
SELECT "State (class)" FROM table_73397 WHERE "Successor" = 'Joseph Anderson ( DR )'
SELECT "State (class)" FROM "table_73397" WHERE "Successor" = 'Joseph Anderson ( DR )'