10. Kamaraj Nagar

Indian National Congress held the seat; the winning margin narrowed from 28.3% to 19.8%.

• Won on a lower shareIts own vote share fell 13.9% — it held because the rest of the vote was more divided.
• New challengerAll India Anna Dravida Munnetra Kazhagam (AIADMK) finished second with 25.3% — it did not contest here in 2011.
• Vote fragmentedThe top two took only 70.4% between them, down from 89.7% — the field split more ways.

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