Nagpur: Even as newly elected MPCC president Nana Patole aims to propel Congress to number one position in the state, the party failed to retain the lone post of zone committee chairman it held in Nagpur Municipal Corporation (NMC), while the ruling BJP improved its stronghold by bagging eight of the nine seats for which elections were held on Tuesday. BJP candidate from Mangalwari zone was elected unopposed even before the election. Thus, of the 10 zones, the BJP has won nine seats, while BSP managed to retain Ashi Nagar. Barring BJP’s Sunil Hiranwar, all nine zone chairpersons are women…