"I don't think this fight is meant for cowards," said Congress spokesperson Supriya Shrinate said.
Congress on Tuesday unleashed a veiled attack on RPN Singh over his resignation by saying that the battle Congress is fighting only can be fought with bravery, coward people can't fight it.
"The battle Congress is putting up all across the country, particularly in Uttar Pradesh is a battle against government resources, its agencies. It's a battle of ideology, truth and to fight a battle as strong pitched as this one you have to fight it with courage and a lot of dedication. I don't think this fight is meant for cowards," said Congress spokesperson Supriya Shrinate while addressing a press conference.
"As Priyanka Gandhi Vadra said, to fight this battle you need to be on your toe, you need to have courage, you cannot be a coward and fight this battle," she added.
Congress leader and former Union minister RPN Singh on Tuesday quit his party, amid speculations that he is set to join the BJP, in a major setback to the party just ahead of the Uttar Pradesh Assembly election.
Taking to Twitter, Mr Singh posted his resignation letter addressed to Sonia Gandhi, "Today, at a time, we are celebrating the formation of our great Republic, I begin a new chapter in my political journey. Jai Hind."
Notably, prior to the resignation, Mr Singh had also changed his Twitter Bio from: My motto India, First, Always. AICC in-charge, Jharkhand, Spokesperson Congress party, Former Minister of State for Home Affairs, to "My motto India, First, Always."
RPN Singh's exit from the party would come off as a massive blow for Congress right before the Assembly elections of the term.
Elections for the 403 Assembly constituencies in Uttar Pradesh will be held in seven phases starting February 10. The polling in Uttar Pradesh will be held on February 10, 14, 20, 23, 27 and March 3 and 7 in seven phases. The counting of votes will take place on March 10.