Delhi Chief Minister Arvind Kejriwal on Monday said that BJP leader Manoj Sonkar's resignation as Chandigarh mayor shows that they won the elections by using "unfair means". Addressing the media outside the Delhi Assembly, Kejriwal said, "If the mayor has resigned then it is very obvious that something is suspicious there. It clearly shows that they won the elections by unfair means." "This is how they win other elections too; if they don't, they buy leaders from the winning party. How will a democratic country function if elections are won unfairly? They (BJP) should let the party that won the elections run the government," Kejriwal alleged. Sonkar resigned as Chandigarh mayor and three AAP councillors -- Neha, Poonam and Gurcharan Kala -- joined the BJP on Sunday. Hitting back at AAP, BJP general secretary Vinod Tawde said that the councillors joined the BJP on their "own will" and alleged that AAP made false promises to those leaders. "AAP councilors joined the BJP on their own