Career diplomat and noted academician Mohammad Hamid Ansari filed nomination papers for the August 10 Vice Presidential poll. He filed two sets of documents in the presence of Prime Minister Manmohan Singh, UPA Chairperson Sonia Gandhi, CPI-M leader Sitaram Yechury, CPI National Secretary D Raja and several Union ministers, including Sharad Pawar, Lalu Prasad, Ram Vilas Paswan and T R Baalu.