After BJP led NDA's defeat, Murlidhar Rao said that both these leaders have betrayed BJP and are the reason for party's defeat in these polls.
"Congratulations to Laluji & Nitishji for this victory in Bihar elections. We bow before people's mandate. It is the victory of democracy and the people of Bihar. I salute them. It appears that the issue of Bihari vs Bahari (and Bihari Babu's absence) has been settled once and for all," he said in tweets.
Once among the BJP's star campaigners, Sinha has been sidelined by the party leadership. He has often taken potshots at the party for the way it has conducted the campaign in Bihar.
Kumar had made "Bihari vs Bahri" one of his main campaign themes, terming Prime Minister Narendra Modi and BJP chief Amit Shah, two most prominent NDA campaigners, as outsiders as he asked people to choose him, a Bihari.
"The call of the day is introspection, modified and better strategy, teamwork and coordination in the future. Salute once again to Biharis," Sinha, BJP MP from Patna Sahib, advised the party leadership in another tweet.
(With inputs from agencies)