All NDA leaders asserted the number of MLAs supporting them would not be less than 125, three more than the magic figure of 122 in the 243-member assembly.
The BJP's manifesto speaks about the Prime Minister's vision of making 'Atmanirbhar Bihar'.
Jha will contest against National democratic Alliance's nominee Harivansh of the Janata Dal-United.
Paswan also said that BJP leaders were free to throw barbs at the LJP, as part of their "coalition dharma", but he would always hold Prime Minister Narendra Modi in high regard.
Kumar's stand is a major setback to the BJP's revival of the Ram temple issue, since he is a powerful leader within the JD(U).
Shah said that the BJP hoped the Dalit nominee would be unanimously selected as the President.
The BJP-led NDA leaders have attacked RJD chief Lalu Prasad Yadav for his statement that Bihar assembly polls is a fight between 'backward versus forward' forces.
Paswan headed a meeting of the party's parliamentary board from Bihar in which the state government was criticised for its over reliance on bureaucracy, with some LJP leaders claiming that Kumar is no longer a popular face, sources said.
Nitish also denied that Rashtriya Janata Dal spokesman Shivanand Tiwari would join the JD-U.
The fight would become more interesting as both candidates hail from Bihar, where the assembly elections are to be held soon, making it effectively a JD-U versus RJD contest.
Ruling parties held sway in most of the 13 states in the assembly byelection results declared on Saturday, with the Bharatiya Janata Party and its allies wresting seats in Uttar Pradesh, Bihar and Rajasthan and the Trinamool Congress sweeping West Bengal.
Rumblings of discontent in the Bharatiya Janata Party followed the party's disastrous performance in Bihar assembly elections on Sunday.
Saturday's voting will mark the end to the marathon polling process that began on April 19 month and has already covered 486 Lok Sabha seats in 28 states and Union territories.
Janata Dal-United president Rajiv Ranjan Singh alias Lalan on Saturday alleged that political strategist-turned-politician Prashant Kishor was 'working for' the Bharatiya Janata Party, as part of its 'conspiracies' to find a firm foothold in Bihar.
Describes the results as a "vote for change and good governance."
Leave alone taking forward the seat-sharing talks with the existing and probable allies, the Mahagathbandhan remains an amorphous entity weeks before the first phase of polling on October 28, a situation that will make the rival NDA camp, which in any case looks sitting pretty, all the more happier.
Kushwaha said a delicious "kheer" can be prepared with milk from the Yadavs and rice from the Kushwahas.
Sources said the opposition parties would look to avoid the prickly leadership question as of now and emphasise on building a common ground.
The Bharatiya Janata Party and its National Democratic Alliance partners - the Janata Dal-United and Lok Janshakti Party -- on Monday formally announced their alliance for the Delhi assembly polls, asserting that it will send a "strong" political message across the country.
If we get a chance to form the next government at the Centre, all backward states will get special category status, Kumar said.
The Congress should take the lead in resolving differences of opinion within the Indian National Developmental Inclusive Alliance (INDIA) and show 'large-heartedness' in seat sharing to emerge as a viable alternative to the Bharatiya Janata Party in upcoming elections, according to some opposition leaders.
As long as he enjoys the PM's blessings, the BJP president's position is safe.
Along with Modi, senior BJP leaders including Rajnath Singh, Amit Shah, Nitin Gadkari, Nirmala Sitharaman and S Jaishankar, all ministers in Modi 2.0 Cabinet, took oath as cabinet ministers at the Rashtrapati Bhavan. In all, 71 ministers were sworn-in along with Modi, taking the strength of the Union council to 72.
As the BJP does soul searching for its humiliating defeat in Bihar polls, senior party leader Arun Jaitley on Monday admitted "irresponsible statements" made during elections "changed the narrative".
'...there are people in the NDA, who don't wish to see Narendra Modi as the prime minister. They are the ones circulating misleading news,' he claimed.
The JD(U)-BJP alliance also lambasted the actress for lodging a 'baseless' first information report against the sisters of the deceased actor and questioned the 'support' extended to her by the Uddhav Thackeray government in Maharashtra, for 'reasons the Shiv Sena knows better'.
The RJD tweeted, "In almost 10 seats, the Nitish administration is delaying the count and not giving certificates to the winning candidates. Sitting in the CM's residence, Nitish Kumar and Sushil Modi are putting pressure on DMs and ROs through phone calls by the CM's principal secretary to decide closely contested seats in their favour."
'The Mallahs may remain divided between the two competing coalitions in Bihar,' says Mohammad Sajjad.
The performance of Janata Dal-United has down compared its performance in the 2015 elections and the ruling party could not win even half of the number of seats it contested in this election.
Gopalkrishna Gandhi also called up Kumar to say thanks.
The LJP rebels are likely to join the JD-U formally on July 7.
Aiming to end the 25-year rule of Lalu-Nitish combine in Bihar, the National Democratic Alliance will formally launch on Thursday its campaign for the crucial assembly polls scheduled later this year with BJP president Amit Shah set to flag off 160 'parivartan raths' from Patna.
National Democratic Alliance allies on Monday put up a united front amid vocal demands being made by some parties on their share of seats in Bihar polls but the crucial issue of seat-sharing was not discussed at their maiden joint meeting chaired by Bharatiya Janata Party president Amit Shah.
The Janata Dal-United on Tuesday became the third major ally after the Shiv Sena and the Akali Dal to snap ties with the Bharatiya Janata Party after 2019.
The former Union minister joined the UPA after holding talks with the Congress leadership.
The state polls are due in October-November.
The condition of Kushwaha, the former Union Minister, is all right, although he has been advised rest, hospital sources said.