Today's step will also help provide a major boost to the "sagging morale" of the Congress ahead of state assembly elections in Rajasthan, Madhya Pradesh and Chhattisgarh, where the party sees an opportunity to upstage the BJP, and 2019 general elections.
Unlike in Goa, Manipur and Meghalaya, where the Congress failed to form its government despite securing the highest seats, it forged a quick post-poll alliance with the JD-S in Karnataka and staked claim to government formation.
Sources said that Congress president Rahul Gandhi discussed the issue with Sonia Gandhi and decided to play out the card of offering chief ministership to HD Kumaraswamy, the son of JD-S supremo and former prime minister HD Deve Gowda.
The decision was conveyed to the JD-S leadership which sealed the deal immediately.
Their presence proved handy today as they engaged the JD-S leaders HD Deve Gowda and HD Kumaraswamy to seal the post poll deal and re-enter what appeared a lost game for them until this afternoon.
The attempt is also a bid to salvage its position in Karnataka, where the party's tally fell from 122 in 2013 to 78 this time and its chief minister Siddharamaiah lost from one of the two seats he contested.
The move will also help bolster the party's attempt to remain at the centre-stage of a larger opposition alliance against the Narendra Modi juggernaut in its bid to defeat the BJP.
The Congress has been a downslide and is losing state after state ever since the Modi-led BJP started its upward journey.
As all parties wait and watch, the Congress today made it clear that it would go all out to ensure that it forms the next Karnataka government with JD(S) and hinted at even moving the court in case it is stopped from doing so.
The Congress has cited the March 13, 2017, judgement of the Supreme Court in this regard as well as constitutional and legal provisions.
It also cited the past practices followed by the BJP in forming its governments in Goa, Manipur and Meghalaya, where the Congress could not form governments despite emerging as the single-largest party.
"We expect the Governor to listen to the mandate of the people...However, all options will always remain open to the Congress," party's communications in-charge Randeep Surjewala said when asked what would the party do if the Governor calls the BJP to prove majority on the floor of the assembly.
"The Governor has no choice but to invite the JD(S)-Congress coalition which has a clear majority to form the government in the state.
"As per constitutional and legal provisions, the Governor has no option but to invite the coalition," he said.
"This is the precedent the BJP has set," he said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)