84. Omalur

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 22.2% to 5.4%.

• Won on a lower shareIts own vote share fell 15.8% — it held because the rest of the vote was more divided.
• New challengerTamilaga Vettri Kazhagam (TVK) finished second with 36.0% — it did not contest here in 2021.
• Vote fragmentedThe top two took only 77.4% between them, down from 92.2% — the field split more ways.

Written from the constituency figures by a fixed set of rules — no language model.