Rajnath Singh alleged that Congress was the "biggest communal party" in the country and added that after winning, he will try to fulfil the unfulfilled dreams of Vajpayee.
BSP has fielded former urban development minister Nakul Dubey and Congress has made former state president and legislator from Lucknow (Cantt) Rita Bahuguna Joshi its candidate.
The ruling Samajwadi Party (SP) had named Ashok Bajpayi as its candidate but changed him at the last minute and fielded state minister for science Abhishek Mishra.