[3] Janata Dal (United) made Rajiv Kumar Singh its candidate in the 2005 assembly elections held in February and October.

But in both the elections, Singh had to face defeat from Rashtriya Janata Dal strongman, Shakuni Chowdhary.

Prior to this, in the year 2000, Rajeev Kumar Singh had also contested on the ticket of Samata Party but he had to face defeat in that election too.

Singh also declared himself to be the real leader of Kushwahas and challenged Chaudhary that he will contest the election against him to prove that he has got more support amongst his castemen.

[6][7] In December 2022, Singh came into limelight after an audio went viral in which he was heard abusing and intimidating a patrolling officer working in his constituency.