MUMBAI, Oct. 10 -- Even as Shiv Sena-backed candidate Mangesh Chivate withdrew his nomination from the Pune Division Teachers' Constituency, easing tensions with the Sena's ally BJP, the ruling alliance faces a challenge from rebels in Nagpur and Amravati. Meanwhile, all is not well within the opposition Maha Vikas Aghadi (MVA), with the Shiv Sena (UBT) and NCP (SP) fielding candidates against each other in the Aurangabad Division Graduates' Constituency. Elections to three graduates' constituencies-Pune, Aurangabad and Nagpur Divisions-and two teachers' constituencies-Pune and Amravati Divisions-are scheduled for October 23. Friday was the last day to withdraw nominations. Explaining his decision to withdraw from the fray, Chivate said, "The party's senior leaders will comment on the matter. I am just a junior party worker." However, in Nagpur, the BJP faces a major challenge from its former MLA and RSS worker Anil Sole, who is contesting as an independent against the party's official candidate Sudhakar Kohale. "Sole, in addition to RSS backing, enjoys support among party leaders in Nagpur as well as an estimated 50% of the city's MLAs and 60% of its corporators," said a BJP leader. "Of the approximately 1,65,000 voters in the Nagpur division, around 85,000 are from Nagpur city. Sole's support base could therefore affect the prospects of the BJP's official candidate." The Shiv Sena is also facing internal challenges in the Amravati Teachers' Constituency, where party leader and former MLC Shrikant Deshpande and Sangeeta Shinde, sister of BJP MP Anil Bonde, have filed nominations. The MVA too is facing intra-alliance dispute in the Aurangabad Graduates' Constituency where NCP (SP) has fielded Pratapsinh Patil and the Shiv Sena (UBT) has nominated Dilip Ghuge. The division of opposition votes could help the NCP candidate, three-term sitting MLC Satish Chavan. However, BJP MLA Prashant Bamb and local BJP leader Sanjay Kenekar have reportedly taken a stand against Chavan. "If caste equations come into play, the votes could be split between Chavan and Patil, both of whom belong to the Maratha community, while Ghuge could attract OBC support," a BJP leader said....