CREATE TABLE table_203_694 (id DECIMAL, "#" DECIMAL, "name" TEXT, "took office" TEXT, "left office" TEXT, "party" TEXT)

which party had the most prime ministers ?
SELECT "party" FROM table_203_694 GROUP BY "party" ORDER BY COUNT("name") DESC LIMIT 1
SELECT "party" FROM "table_203_694" GROUP BY "party" ORDER BY COUNT("name") DESC NULLS LAST LIMIT 1