CREATE TABLE table_204_223 (id DECIMAL, "party" TEXT, "previous council" DECIMAL, "staying councillors" DECIMAL, "seats up for election" DECIMAL, "election result" DECIMAL, "new council" DECIMAL)

which party had more staying councilors ?
SELECT "party" FROM table_204_223 ORDER BY "staying councillors" DESC LIMIT 1
SELECT "party" FROM "table_204_223" ORDER BY "staying councillors" DESC NULLS LAST LIMIT 1