CREATE TABLE table_204_145 (id DECIMAL, "representative" TEXT, "state" TEXT, "district ( s ) " TEXT, "served" TEXT, "party" TEXT, "date of birth" TEXT, "date of death" TEXT, "age" TEXT)

which party has the highest number of deaths ?
SELECT "party" FROM table_204_145 GROUP BY "party" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "party" FROM "table_204_145" GROUP BY "party" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1