Congress is perceived to be the 'sole claimant' of Muslim votes and AIMIM's presence may prove detrimental for it. In Hawa Mahal, for instance, Congress has fielded RR Tiwari against BJP's Mahant Balmukund Acharya. The perception is that Congress garnered the entire chunk of minority votes earlier and AIMIM and AAP are claimants too this time.
