New Delhi, Aug. 5 -- Poll strategist Prashant Kishor has resigned as principal advisor to Punjab Chief Minister Amarinder Singh. He was appointed as principal advisor to Singh in March. In a letter to the Punjab chief minster, Kishor said that he was taking "a temporary break from active role in public life".

"In view of my decision to take a temporary break from active role in public life, I have not been able to take over the responsibilities as your Principal Advisor.

"Since I am yet to decide on my future course of action, I write to request you to kindly relieve me from this responsibility. I take this opportunity to thank you for considering me for this position," he said.

Kishor was appointed to design election campaign for Cong...