CREATE TABLE table_12597 ("State" TEXT, "Status" TEXT, "Association Agreement" TEXT, "Membership Application" TEXT, "Candidate status" TEXT, "Negotiations start" TEXT, "Screening completed" TEXT, "Acquis Chapters open/closed" TEXT)

What is the status of the membership application on 2008-12-15?
SELECT "Status" FROM table_12597 WHERE "Membership Application" = '2008-12-15'
SELECT "Status" FROM "table_12597" WHERE "Membership Application" = '2008-12-15'