CREATE TABLE table_203_798 (id DECIMAL, "party" TEXT, "votes" TEXT, "%" DECIMAL, "swing" DECIMAL, "seats" DECIMAL, "change" DECIMAL)

who had the most seats after the election ?
SELECT "party" FROM table_203_798 ORDER BY "seats" DESC LIMIT 1
SELECT "party" FROM "table_203_798" ORDER BY "seats" DESC NULLS LAST LIMIT 1