Chandigarh, Oct. 9 -- The Centre's opposition to commuting the death sentence of Balwant Singh Rajoana, convicted in the assassination of former Punjab chief minister Beant Singh, has brought into focus another layer of uncertainty to the potential revival of the alliance between the Bharatiya Janata Party (BJP) and the Shiromani Akali Dal (SAD) ahead of the high-stakes Punjab assembly elections due early next year. P2...