Thousands of Indian MPs and assembly members representing Thursday began casting their votes to choose a new president. It is a direct contest between ruling United Progressive Alliance (UPA) candidate Pranab Mukherjee and opposition-backed Purno Sangma.
Voting to choose the 13th president started simultaneously at national and state capitals.
The electoral college has 4,100 assembly members and 776 members of the Lok Sabha and the Rajya Sabha.
In Delhi, polling began at 10 a.m. at Room No 63 of Parliament House. Arrangements for state legislators to vote have been made at assembly buildings in every state capital.
Polling will continue till 5 p.m.
The votes will be counted Sunday, three days before President Pratibha Patil five year tenure ends.
India faces a spectrum of security challenges and there is need for reorientation of the country's strategic thinking Prime Minister Manmohan Singh said.
As the UPA II completes four years and is set to release its report card at its celebration dinner, the BJP has questioned what the celebration is for.
On the fourth anniversary of UPA-II, opinion polls have not brought any cheer to the government.
Distancing himself from the UPA's falling fortunes, Samajwadi Party Chief Mulayam Singh Yadav may skip the dinner which PM Manmohan Singh will host.
The UPA government was involved in all the recently unearthed scams, and the involvement of some of its ministers in the IPL spot fixing would emerge, Janata Party leader Subramanian Swamy said
India and China held very "specific" discussions without "shying away from anything", External Affairs Minister Salman Khurshid said here Tuesday.
Chinese Premier Li Keqiang has termed his India visit as "successful", saying he "felt at home" during talks with his counterpart Manmohan Singh.