Voting began on Monday in the Congress presidential polls as senior leaders Mallikarjun Kharge and Shashi Tharoor face-off for the post of AICC chief, as the party gets set to have a non-Gandhi president in more than 24 years.

Over 9,000 Pradesh Congress Committee (PCC) delegates form the electoral college to pick the party chief in a secret ballot.

Voting began at 10 am at the AICC headquarters here and at party’s polling booths in state offices across the country in an electoral contest which is taking place for the sixth time in the party’s 137-year history.

Veteran Congress leader P Chidambaram was the first to cast his vote at the AICC headquarters here, sources said.

Outgoing party chief Sonia Gandhi and Congress general secretary Priyanka Gandhi Vadra came together at the AICC headquarters and cast their vote.

When asked by reporters about the polls, Sonia Gandhi said, “I have been waiting for a long time for this day.”

Later, former prime minister Manmohan Singh also cast his ballot in the polls at the party headquarters where the 68th polling booth for the AICC presidential poll has been set up

Several senior leaders such as general secretary Jairam Ramesh, Ambika Soni, Ajay Maken and Vivek Tankha, among others, cast their vote at the party headquarters.

Congress general secretary Priyanka Gandhi Vadra casting her vote at the AICC headquarters.

Congress leaders Rahul Gandhi and Mallikarjun Kharge- one of the candidates in the party’s Presidential polls, cast their votes in the election to the top post, for which voting is underway in Karnataka on Monday.

Rahul Gandhi cast his vote in a meeting room container converted into a polling booth at the Bharat Jodo Yatra camp site in Sanganakallu in Ballari district, while Kharge voted at the Karnataka Pradesh Congress Committee office in Bengaluru.

About 40 other Bharat Yatris, who are PCC delegates, will also be casting their votes at the camp site in Sanganakallu on Monday, which has been declared as “Rest Day” for the Bharat Jodo Yatra.

State Congress President D K Shivakumar and Leader of the Opposition in the Karnataka Assembly Siddaramaiah cast their votes at the KPCC office in Bengaluru.

Tharoor will cast his vote at the Kerala Congress headquarters at Thiruvananthapuram.

Former prime minister Manmohan Singh casting his vote at the AICC headquarters.

Kharge is considered the firm favourite for his perceived proximity to the Gandhis and backing by senior leaders, even as Tharoor has pitched himself as the candidate of change.

During the campaign, even though Tharoor raised issues of uneven playing field, both candidates and the party have maintained that the Gandhis are neutral and that there is no “official candidate”.

Ahead of the polling, Kharge had said he would have no shame in taking the advice and support of the Gandhi family in running the party affairs, in case he becomes its president, as they have struggled and put their strength for its growth.

The veteran leader had said he is the “delegates’ candidate” in these polls.

Tharoor on his part took a veiled dig at some senior leaders supporting Kharge, saying some colleagues were “indulging in ‘netagiri’ and telling party workers” that they know whom Sonia Gandhi wants elected.

If anyone has “fear or doubt” in their mind, the party has made it clear that it will be a secret ballot, he had said in Lucknow on Sunday and urged the Congress delegates to listen to their hearts while voting to elect the new party president.

While the Kharge camp had shared a campaign video seeking votes for him which included visuals of him walking with Rahul Gandhi in the Bharat Jodo Yatra with the song ‘Kandhon se milte hain kandhe’ from the movie Lakshya playing in the background, Tharoor had issued a fervent video appeal on Twitter calling on electors to show courage to “embrace change”.

Tharoor had asserted that in the change he envisions, the party’s “values and loyalties” will remain the same with only the ways of achieving the goals undergoing a transformation.

Electors in the Congress presidential polls have been asked to put a tick mark against the name of their choice on the ballot paper after AICC president candidate Tharoor’s team took up with the party’s top poll body the issue of its earlier directive that voters write “1” to reflect their preference, citing that it may lead to confusion.

“The voters are instructed to put a tick mark in the box in front of the candidate whom they wish to vote for. Putting any other symbol or writing a number would make the vote invalid,” the directive from Mistry’s office had said.

Asked about the significance of the polls, Congress general secretary in-charge communications Jairam Ramesh had told PTI that he has always believed in the Congress model of evolving a consensus for such positions.

The most famous practitioner of this approach in the post-Nehruvian era was K Kamaraj, he noted.

Though the campaign has been largely about a roadmap for the party which the two candidates have elaborated upon during their meetings with PCC delegates at various headquarters of the party in states, it has also seen complaints and claims of an uneven playing field by the Tharoor camp.

The contrast in the campaigns has been stark – while Kharge’s campaign has seen several senior leaders, PCC chiefs and top leaders receiving him at the state headquarters visited by him, Tharoor has mostly been welcomed by young PCC delegates with PCC chiefs mostly absent from his events.

Tharoor has said during his campaign that he is the candidate of change while Kharge represents status quo. He has also claimed that youngsters and people in lower levels of the party are supporting him, while seniors are backing his rival.

Kharge, on his part, has highlighted his experience, coming up the organisational ranks over decades and his ability to take everyone along.