Here is a look at how prominent leaders are faring in the contest.
Jammu and Kashmir Chief Minister Omar Abdullah distanced himself from the 'vote chori' issue raised by the Congress, stating the INDIA bloc has no involvement.
Bihar Chief Minister Nitish Kumar praised the Narendra Modi government's support for the state's progress and urged voters to support the NDA in the upcoming assembly elections. He also criticized Lalu Prasad's governance and dynastic politics.
The Jharkhand Mukti Morcha (JMM) has announced it will contest the Bihar assembly elections independently and review its alliance with the Congress and RJD in Jharkhand after the Bihar elections.
RJD leader Tejashwi Yadav has criticized Prime Minister Narendra Modi for using the term 'katta' (country-made gun) in a recent election rally in Bihar, calling it an inappropriate choice of words for a Prime Minister.
Union Home Minister Amit Shah and Rahul Gandhi are set to address public rallies in Bihar on Wednesday in support of their respective party nominees. Other leaders will also campaign ahead of the upcoming elections.
A court in Bihar's Sheikhpura district has issued summonses to INDIA bloc leaders Rahul Gandhi, Tejashwi Yadav, and Mukesh Sahani in connection with alleged abuses hurled at Prime Minister Narendra Modi during a Congress event in August.
Indian National Developmental Inclusive Alliance (INDIA) chief ministerial candidate Tejashwi Yadav on Sunday asserted that the opposition coalition was certain to form the next government in Bihar, and the swearing-in will take place four days after the results of assembly polls are declared.
A banner at the venue of a Mahagathbandhan press conference in Patna, featuring only Tejashwi Yadav, has sparked controversy due to the absence of other INDIA bloc leaders' photos. This comes amid seat-sharing negotiations for the upcoming Bihar assembly polls.
A day after the opposition parties announced 'INDIA' as the name for their alliance, they finalised 'Jeetega Bharat' as the 26-member bloc's tagline, setting the tone for their 2024 Lok Sabha election campaign.
People of Bihar wait with bated breath for Friday's counting of votes polled in the recent assembly elections, which will decide whether Janata Dal-United supremo Nitish Kumar, the state's longest-serving chief minister, will get a record fifth term or whether a change in government will be witnessed.
As the election dates come closer, Rashtriya Janata Dal leader Tejashwi Yadav is likely to be announced as the chief ministerial candidate by the opposition Mahagathbandhan on Thursday.
RJD candidate Satendra Sah was arrested immediately after filing his nomination papers from Bihar's Sasaram assembly seat due to a pending non-bailable warrant from Jharkhand. This marks the third such incident of INDIA bloc candidates being arrested after filing nominations.
Vikassheel Insan Party (VIP) announced its support for a rebel RJD candidate in Bihar, who is contesting against its own national president, creating confusion within the INDIA bloc.
Bihar Chief Minister Nitish Kumar announced free power up to 125 units for all domestic consumers in the state, effective from August 1. The move, benefiting 1.67 crore households, comes ahead of the upcoming assembly polls and amid promises from opposition leaders.
In future if the party wins, people would say 'INDIA has won,' but if the party loses, then people would say 'INDIA has lost'
RJD leader Tejashwi Yadav promised that if the INDIA bloc comes to power in Bihar, it will ensure every family has a member with a government job, enacting legislation within 20 days of forming the government.
An alliance between the Aam Aadmi Party and the Congress in Delhi and in different states, including Gujarat and Haryana, for the Lok Sabha polls may be officially announced on Saturday, sources in the AAP said.
Rijiju, however, did not specify when and who will give notice for privilege motion against Gandhi. It is believed that someone from treasury benches in the Lok Sabha will do so.
Senior Congress leader Ashok Gehlot on Wednesday met Rashtriya Janata Dal president Lalu Prasad Yadav, apparently with the mandate to defuse tensions with the ally, which has plunged the Indian National Developmental Inclusive Alliance (INDIA) into turmoil in poll-bound Bihar.
The Congress on Wednesday alleged that the government has announced the start of the Monsoon session of Parliament 47 days before it is due in order to run away from the demand of the party and Indian National Developmental Inclusive Alliance (INDIA) for an immediate special session to discuss the Pahalgam attack and the Centre's failure to bring the terrorists to justice.
Congress leader Rahul Gandhi on Sunday jumped into a muddy pond in Bihar and interacted with fishermen present at the spot, whom he told that they always had his back.
Sources in AAP claimed that the party was contacted by the Shiv Sena-UBT and the NCP-SP for campaigning by Kejriwal in Maharashtra.
The Bharatiya Janata Party-led Mahayuti coloured Maharashtra a vivid saffron on Saturday as it swept aside the Maha Vikas Aghadi for a landslide win while the opposition Indian National Developmental Inclusive Alliance (INDIA) retained Jharkhand, voters in both states giving the parties in power an emphatic thumbs up.
Congress leader Rahul Gandhi jokingly mentioned ongoing discussions with RJD president Lalu Prasad regarding marriage, following a suggestion from Prasad's son to Union Minister Chirag Paswan.
Rahul Gandhi said that had an INDIA Bloc government negotiated the trade agreement with the US, it would have told US President Donald Trump that he should treat India as an equal.
Senior Congress leader Sonia Gandhi has been admitted to Sir Ganga Ram Hospital in New Delhi with mild fever, but her condition is stable, sources said on Sunday.
The Congress on Wednesday said the Indian National Developmental Inclusive Alliance (INDIA) constituents did not seek a division of votes in the Speaker's election as they wanted to maintain a spirit of consensus and cooperation.
No final decision has been taken on the alliance with the Congress for the October 5 Haryana assembly polls yet, sources in Aam Aadmi Party said on Sunday. The last date to file nominations is September 12.
The Parliament session is set to start today, with various issues slated to be discussed, including the Waqf Act (Amendment) Bill.
Prime Minister Narendra Modi asserted that the record turnout in the first phase of the Bihar assembly polls indicates people's trust in the NDA government. He predicted victory for the NDA, led by Chief Minister Nitish Kumar, and lauded the Election Commission for conducting successful elections.
Trinamool Congress leader Mamata Banerjee will not be part of the virtual meeting on Saturday morning as she is preoccupied with prior engagements, they said.
Leaders of 16 opposition parties demanded a special session of Parliament on Operation Sindoor in a letter to Prime Minister Narendra Modi as Indian National Developmental Inclusive Alliance (INDIA) parties held a meeting on the issue in the national capital on Tuesday.
Congress leader Rahul Gandhi on Monday said his party will soon come out with a 'hydrogen bomb' of revelations about 'vote chori' and after that Prime Minister Narendra Modi will not be able to show his face to the country.
When asked what transpired at the informal meeting of the alliance leaders in the evening, the Delhi chief minister said his party sought seat-sharing discussions for all the states.
'He's (Modi) asked CMs of different states to work together as 'Team India'. He even made an appeal to Vote India!'
Kejriwal claimed that the BJP has ruined Gujarat in its 30-year rule. The Congress has failed as an opposition because it helps the BJP retain power, he said.
In line with most of the exit poll predictions, bookies in Delhi feel the ruling Bharatiya Janata Party-led National Democratic Alliance (NDA) will get more than 340 seats in the Lok Sabha polls while the Indian National Developmental Inclusive Alliance (INDIA) may secure around 200 seats.
According to the sources, the meeting will be held at 10 am on Thursday in the chamber of Rajya Sabha LoP.
A police complaint has been lodged at Barakhamba police station in Delhi, against 26 Opposition parties "for improper use of the name of INDIA and use of the said name for the undue influence and personation at elections."