A polling fight has broken out in New Taipei City's mayoral race, and it is turning into an awkward moment for the Su family.

• A new poll showing the New Taipei race in a certain shape drew complaints that its sample does not match the city's real voter mix.
• DPP candidate Su Chiao-hui said she will not attack the polling firm, taking the high road.
• The KMT camp of Lee Si-chuan hit back, saying her father, former premier Su Tseng-chang, did the opposite for years.
• The jab points to 2011, when Su Tseng-chang accused a party rival of pushing fake polls during the DPP presidential primary, and to 2018, when he dismissed a poll showing him behind in New Taipei.

Outlook: Expect more attacks on poll credibility as the New Taipei race tightens, with both camps using numbers they like and dismissing the ones they don't.