One of the members of UPA is Indian National Congress , whose president Sonia Gandhi is also the chairperson organization.leadership the UPA

Other politicians , such as Sonia Gandhi , chairperson organization.leadership the Indian National Congress and Nitin Gadkari of the BJP expressed their anger and offered condolences to the families of the bombing victims .

The Indian National Congress had announced , on the fourth anniversary of the second United Progressive Alliance government , that its campaign for the election would be led by incumbent Prime Minister Manmohan Singh , INC chairperson organization.leadership Gandhi and general secretary Rahul Gandhi .

The chairperson organization.leadership Bahujan Samaj Party , Mayawati , demanded CBI enquiry into the incident and said that it `` has infused fear among people '' .

Hamid Ansari filed his nomination papers on 18 Jul United Progressive Alliance chairperson organization.leadership Gandhi , Prime Minister , Manmohan Singh Samajwadi Party leader Mulayam Singh Yadav , INC general secretary Rahul Gandhi , Nationalist Congress Party leader Sharad Pawar , RLD leader Ajit Singh , National Conference leader Farooq Abdullah , Finance Minister P Chidambaram , Defence MinisterA .