Former Indian Finance Minister Pranab Mukherjee, right, waves while exiting parliament house with Indian Prime Minister Manmohan Singh, left, and Congress party president Sonia Gandhi, center behind, after filing his nomination as the presidential candidate of the ruling alliance in New Delhi, India, Thursday, June 28, 2012. Mukherjee also has the support of two major regional parties. His rival is Purno A. Sangma, a former speaker of the lower house of Parliament.