Battlelines have been drawn for the Delhi assembly polls. The three big players for the chief ministers' job today took on each other, just a day after the poll dates were announced. Arvind Kejriwal, whose Aam Aadmi Party or AAP is making its political debut in these elections, turning up the heat on the Congress and the BJP, vowed to hold a special Assembly session at Ramlila ground on December 29 to adopt the Lokpal Bill, after forming the government.