One of the key constituencies in what is now looking like a three-cornered fight in Uttar Pradesh for the national election, due by May, is the state's capital Lucknow. For decades, the seat has been a BJP stronghold with stalwarts like Atal Bihari Vajpayee and now home minister Rajnath Singh as its representatives in parliament. Interestingly, it is the Congress that is the BJP's main opponent on the seat.