Congress president Sonia Gandhi on Wednesday described the presidential election as a battle of ideologies and principles and said the opposition was determined to fight it.
"For us, it is a battle of ideologies, principles and truth and we will fight it," she said after the opposition's presidential candidate Meira Kumar filed her nomination in Parliament.
The Congress president led the 17 opposition parties in accompanying the former Lok Sabha speaker as she filed her nomination on Wednesday morning.
Gandhi is one of Kumar's proposers in one set of nomination papers, sources said.
Congress vice president Rahul Gandhi, who is abroad on a vacation, said Kumar represents the values that bind the country and its people.
"Against the ideology of divisiveness she represents the values that bind us as a nation and people. Proud to have Meira Kumar ji as our candidate," he tweeted.
Meira Kumar today filed her nomination in the presence of top Congress and opposition leaders and said it marked the beginning of her "fight for ideology".
Accompanying the former Lok Sabha speaker as she filed her nomination in Parliament House were a host of opposition leaders, including NCP's Sharad Pawar and CPI-M general secretary Sitaram Yechury.
Sonia Gandhi and other top Congress and other opposition leaders were amongst those who proposed and seconded her nomination.