With the BJP racing ahead in Haryana as per the early trends, AAP convener Arvind Kejriwal on Tuesday said the "biggest lesson" of the poll results is that one should never be "overconfident" in the elections. The BJP looks forward to a comfortable win in Haryana, leading in 50 of the 90 assembly seats. "Let us see what the results are in Haryana. The biggest lesson of this is that one should never be overconfident in the elections," said Kejriwal addressing a gathering of the AAP municipal councillors. "No election should be taken lightly. Each election and each seat is tough," he added. The AAP failed to reach a pre-poll alliance in Haryana with the Congress due to disagreement over number of seats to be contested by it. It independently contested 89 of the total 90 seats in the state after its demand for being given 9 seats was turned down by the Congress. The AAP candidates were trailing on almost all the seats behind their BJP and Congress opponents. Kejriwal had earlier du