Bahujan Samaj Party supremo Mayawati and Samajwadi Party chief Akhilesh Yadav, who have extended support to the Congress to form the government in the state, were not present.
The BJP won 12 of 15 seats on which bypolls were held. Congress could win only two.
The state BJP, meanwhile, has urged the government to drop its decision to celebrate Tipu Jayanti and not to stand on 'prestige' or 'ego'.
The victories with huge margins came as a Diwali gift and a shot in the arm for the nearly six-month-old alliance ahead of the 2019 Lok Sabha polls after facing frequent questions about its longevity.
The party managed only 52 seats on its own and many of its top leadership, including Rahul Gandhi, Mallikarjun Kharge and Jyotiraditya Scindia were defeated in the polls.
Naidu met Congress president Rahul Gandhi and discussed with him the possibilities of all opposition parties uniting and forging a joint opposition alliance.
The decision was taken at a meeting of Sanyukt Kisan Morcha, an umbrella body of 40 farmer unions protesting at various Delhi border points against three farm laws.
Finance Minister Arun Jaitley said the excise duty cut would have an impact of Rs 10,500 crore on central government's tax revenues.
Under attack from the opposition over his luxurious watch, Karnataka Chief Minister Siddarmaiah on Thursday said he would declare it as a state asset and hand it over to the government.
'The results show that he is the best person to manage individuals in the party.'
Both Hassan and Mandya, where the BJP's strength is negligible, are currently held by JD-S, which Congress too is eyeing this time.
Kumaraswamy predicted that the political instability would continue in the state.
He said a volcano is waiting to erupt in Cong-JD(S) alliance.
Suresh Kumar said he was withdrawing his nomination following a direction from the BJP leadership.
The confidence motion moved by Kumaraswamy was defeated with 99 members voting for the motion and 105 against it in a House of 225 including speaker P R Ramesh Kumar and a nominated member.
'There is a need for the Congress to introspect.' 'Introspection means to find out where we have gone wrong in the last eight-ten years, how we have gone wrong, where we have failed to succeed.'
JD-S sources read it as an attempt by Modi to sow seeds of doubt in the Opposition ranks.
The BJP needs to win at least six of the seats to remain in majority in the 225-member assembly (including the Speaker, who has a casting vote), which would still have two vacant seats -- Maski and R R Nagar.
JD-S leaders have already dropped enough hints about the party being open to such a possibility.
Congress leadership would take a call on who would be its deputy chief minister on Tuesday.
Gowda said that the JDS has only joined hands with the BSP which will continue in the 2019 Lok Sabha elections.
The Congress is looking at Channapatna to take revenge on the JD-S which, it believes, has an underhand deal with the BJP to stop it from getting a majority.
Setting the stage for the revival of an united front against the BJP, Naidu claimed the mood of the nation was against the BJP-led National Democratic Alliance and soon an alliance would be formed with various regional parties.
Former Karnataka chief minister H d Kumaraswamy's entry into the Chikkaballapur constituency will make the going tough for his opponent, and Union minister and former chief minister Veerappa Moily, who had won the 2009 election from here comfortably, reports Vicky Nanjappa.
The names of both Maregowda and Puttaraju had figured in the list of missing Janata Dal-Secular workers tweeted by Chief Minister H D Kumaraswamy on Monday.
There seems to be no "closure" for B S Yediyurappa, the Bharatiya Janata Party's "comeback man" in Karnataka, as he could never complete a full term in office, despite becoming the chief minister four times, surmounting odds. It's also too early to write a political obituary of the 78-year old Lingayat strongman and the 24X7 politician, the face of the party in the state for decades.
'Rahul is misguided by a handful of family retainers who don't want him to show unrestrained initiative in forming allies.' says Sudhir Bisht.
The by-elections are being held to fill the vacancies caused by the disqualification of 17 rebel Congress and Janata Dal-Secular MLAs, whose rebellion led to the collapse of the H D Kumaraswamy-led coalition government in July and paved the way for the BJP to come to power.
A bench headed by Chief Justice Ranjan Gogoi further said Karnataka assembly speaker K R Ramesh Kumar was free to decide on the resignations of the rebel legislators within the time-frame decided by him.
While Nagaraj made no clear announcement of taking back resignation, the same was affirmed by Shivakumar while speaking to media outside Nagaraj's residence.
Swami, who headed the Sree Siddaganga Mutt, breathed his last at the age of 111 on Monday at 11.44 am.
'The message they want to send to the country is that they can do anything by hook or crook'
Gowda also said he did not know how long the Congress-JD-S government, headed by his son H D Kumaraswamy, would continue and it was in the hands of the senior coalition partner.
Unfazed by Yeddyurappa's unceremonious exit, the BJP on Thursday fielded its senior leader S Suresh Kumar, a fifth term MLA, for the post of the Speaker whose election will precede the trust vote.
Many leaders from non-Hindi states, especially Tamil Nadu and Karnataka, had opposed the policy.
The then disqualified Congress-JDS MLAs who had shifted loyalty to the BJP and won the December by-elections, were sworn-in at a simple ceremony at Raj Bhavan with Governor Vajubhai Vala admistering oath of office and secrecy.
Modi's remarks assume significance as they come after most pollsters predicted a fractured verdict in the assembly elections, with no party attaining a majority on its own.
Born on November 3, 1933 at Challakere in Chitradurga, Sharief had an illustrious political career spanning 50 years.
The Congress's master strategist is so incredibly popular and resourceful that even Chief Minister BS Yediyurappa regretted his arrest. That's the secret of D K Shivakumar's success, says Aditi Phadnis.
The protesters poured into the city from different parts of the state, particularly the Vokkaliga stronghold of Old Mysuru region, in response to "Raj Bhavan Chalo" call given by various outfits of the community.