Renuka Chowdary seconded him.
"Congress has done brilliantly. Our strength has increased. Morally, it has been a brilliant intervention of Rahul Gandhi," Chowdary said.
She also accused the prime minister of postponing the winter session in view of the assembly polls and taking personal swipes at opposition leaders during the poll campaign, marking a "new low" in public discourse.
The jump in the Congress tally, according to trends, was due to Gandhi's "very effective" campaign in the state, Shashi Tharoor added.
"We may not have reached the destination, but our journey was good," Tharoor said.
According to latest trends on the Election Commission website, the BJP was leading in 102 assembly segments, while the Congress was ahead in 74 seats.
In the last election result in 2012, the BJP won 115 seats and the Congress 61.