Chandigarh, Feb. 19 -- In more twists in the Chandigarh mayoral poll saga, three Aam Aadmi Party (AAP) councillors joined the Bharatiya Janata Party (BJP) and newly elected mayor Manoj Sonkar resigned from the post on Sunday, a day before the Supreme Court is scheduled to resume its hearing on AAP's petition alleging tampering of votes in the election held on January 30....