Nitish's absence triggered speculation of a logjam in the coming together of Janata Dal-United and RJD ahead of the crucial state election.
Rahul said it is clear that things are "not normal" in Jammu and Kashmir.
Gopalkrishna Gandhi also called up Kumar to say thanks.
A former protege of the JD-U de facto leader, Kushwaha, had revolted against Kumar in 2013, giving up his Rajya Sabha berth and floated his own outfit.
JD-U Rajya Sabha MPs Ali Anwar and M P Veerendra Kumar met senior leader Sharad Yadav amid reports that he was also displeased with Nitish Kumar's action.
The outspoken Lok Sabha member from Patna Sahib, in a no-holds-barred assault on the Modi government, said its ministers were a "bunch of sycophants" 90 per cent of whom were hardly known to people.
Naidu met Congress president Rahul Gandhi and discussed with him the possibilities of all opposition parties uniting and forging a joint opposition alliance.
Prime Minister Narendra Modi, Home Minister Amit Shah, Lok Sabha Speaker Om Birla, Union Health Minister Harsh Vardhan and Minister of State for Health Ashwini Choubey are at the hospital to enquire about his health condition.
'The merger is undemocratic. Leaders have flouted the party (JD-U) constitution,' says Devendra Prasad Yadav, a JD-U member of Parliament.
Known for weighing his options carefully before making any move, Kumar, upon a closer look, comes across as a risk taker who has not shied away from going against the tide.
Known for weighing his options carefully before making any move, Kumar, upon a closer look, comes across as a risk taker who has not shied away from going against the tide.
Gandhi came along with Mukherjee and while the former president left after sometime, the Congress chief offered to drop him back but Mukherjee politely refused.
Stay away from violence and work for the party was Mulayam Singh Yadav's message to Samajwadi Party workers on the party's 9th national convention in Lucknow.
Jitan Ram Manjhi went ahead with proposing dissolution of the assembly
Banerjee also criticised Dhankhar over his recent visit to North Bengal, claiming a conspiracy was being hatched to divide the region.
Gandhi's name was the only name discussed when 18 opposition parties met to decide on their candidate for the vice presidential poll, the sources said.
Political leaders from across states in the country have turned up for the event. Here's a glimpse at some of the leaders who have shown up for the big-ticket event.
RJD chief Lalu Prasad and other leaders claimed the countdown for the ouster of the BJP and its allies from power in the 2019 Lok Sabha polls had begun.
Several leaders from the Congress and its alliance partners from across the country attended the event.
Bihar Chief Minister Jitan Ram Manjhi has sent a recommendation to Governor Keshari Nath Tripathi to sack two state cabinet ministers.
Bihar's ruling Janata Dal-United on Saturday night suspended 3 women MLAs including a former minister, for campaigning and seeking votes for Bharatiya Janata Party and Rashtriya Janata Dal candidates.
They entered the Bihar poll battle to protect and carry forward their fathers' political legacy, but many of them could not win their own seat though some tasted victory.
He said his party was neither expecting nor planning to discuss the expansion
Janata Dal-United, a key constituent of the National Democratic Alliance, on Friday voiced concern over the Opposition alliance "deviating" from its national agenda but said it has not given any ultimatum to Bharatiya Janata Party over walking out of the coalition.
Janata Dal-United on Monday gave first indications of parting ways with the National Democratic Alliance, saying it is "difficult" to remain in the alliance which is on "ventilator support" in the wake of resignation of L K Advani from top BJP posts and anointment of Narendra Modi as party's campaign committee chief for next Lok Sabha polls.
The Bihar CM has been expelled for anti-party activities.
Manjhi has called planned JD-U legislature party meet an unauthorised one.
There was considerable disquiet in the Congress after Mukherjee accepted the invitation of the RSS to address its workers at its headquarters in Nagpur.
Key United Progressive Alliance ally Mamata Banerjee, who kept up the suspense till the last moment before backing Pranab Mukherjee in the Presidential elections, on Wednesday attended Mukherjee's oath taking ceremony while no Chief Minister from Bharatiya Janata Party-ruled states were present.
Former Army chief V K Singh will attend the rally organised by Haryana's main opposition party Indian National Lok Dal in Rewari on Thursday, the party's President Om Prakash Chautala has said.
The Janata Dal - United, which had backed United Progressive Alliance's Presidential candidate Pranab Mukherjee, on Monday supported the Bharatiya Janata Party's candidate Jaswant Singh for the vice presidential election.
Janata Dal-United president Sharad Yadav dismissed speculation about his party firming up alliance with the Congress, saying there was no such prospect both pre and post 2014 Lok Sabha elections.
Opposing the steep hike in petrol prices and spiralling prices of commodities, National Democratic Alliance has called for a nation-wide bandh on May 31.
According to sources, Congress managers are attempting to fix a meeting between Sonia Gandhi and Mayawati. Congress is hopeful that Mayawati will support any government other than BJP, even though the BSP supremo had lashed out at Congress throughout her campaigning.
Bihar Chief Minister Nitish Kumar has sacked all 11 ministers from the cabinet.
Sharing the dais with Ramdev, Bharatiya Janata Party President Nitin Gadkari on Monday pledged his party's "full support" to the yoga guru's agitation against black money and launched a blistering attack on the Congress-led United Progressive Alliance government on issues like corruption and black money.
Mamata Banerjee's plans for a no-confidence motion against the United Progressive Alliance government on FDI and other issues on Tuesday appeared to be running out of steam with clear indications from opposition Janata Dal-United that it is not inclined to the idea.
Prime Minister Dr Manmohan Singh's Rajya Sabha term is ending next month. There is virtually no doubt that Manmohan would get re-nominated from Assam but a section of the Congress is said to be "hoping against hope" that he opts out.
The five-member panel will recommend measures to ensure safety of students and will probe lapses in security, if any. The students and civil society members, meanwhile, took out a protest march demanding resignation of the V-C.
Sharad Yadav, JDU chief and NDA convener, tells Gyan Varma if the UPA had discussed Pranab Mukherjee's nomination for Presidential election before announcing his name, the NDA would not have put up its candidate against the former finance minister