Indian politicians from left, main opposition Bharatiya Janata Party President Nitin Gadkari, Orissa state Chief Minster Naveen Patnaik, presidential candidate Purno A. Sangma, BJP leader Sushma Swaraj and Subramanian Swamy walk towards the media outside the parliament house, in New Delhi, India, Thursday, June 28, 2012. Sangma, a former speaker of the lower house of Parliament and a tribal from Indian northeastern state of Meghalaya Thursday filed his nomination papers for the July 19 Indian presidential elections.