"I respect party's decision and accept it. I will never go against it and will work for ensuring victory of the party candidate," Tondon said.
He swept the Lucknow seat in 2009 general elections by 40,000 votes over his Congress rival Rita Bahuguna Joshi.
Rajnath Singh was on Sunday declared BJP's candidate from the constituency.
"It’s time of change...Roles used to change with time," Tondon, considered close to former prime minister Atal Bihari Vajpayee, added.


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