Tension between the Shiv Sena and the Congress - unlikely allies in Maharashtra's ruling Maha Vikas Aghadi government in - appear to have re-emerged as the Sena's three-decade-old campaign to rename the city of Aurangabad (named after Mughal ruler Aurangzeb) to Sambhajinagar (after Chhatrapati Shivaji's son, whom Aurangzeb had killed) gathers pace once more.