389. Sivaganga

Indian National Congress held the seat; the winning margin narrowed from 30.6% to 19.5%.

• Won on a lower shareIts own vote share fell 11.6% — it held because the rest of the vote was more divided.
• New challengerAll India Anna Dravida Munnetra Kazhagam (AIADMK) finished second with 21.1% — it did not contest here in 2019.
• Vote fragmentedThe top two took only 61.7% between them, down from 73.8% — the field split more ways.

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