Arvind Kejriwal is leading in New Delhi, Congress' Kiran Walia and BJP's Nupur Sharma trail; Kiran Bedi leads in Krishna Nagar; AAP's Somnath Bharti leads in Malviya Nagar, Congress' Yoganand Shastri trails; in Patparganj, AAP's Manish Sisodia leads over Vinod Binny, who switched from AAP to BJP