"BJP government in Delhi and Madhya Pradesh wants to end reservation aimed at the upliftment of Dalits and tribals, while Congress hasn't worked for tribesmen's welfare on the ground," JD(U) president Sharad Yadav told an election meeting here ahead of polls on this crucial tribal reserved seat on November 21.
He said that the condition of tribals hasn't improved in the country and they have been exploited by both Congress and BJP.
"Congress and BJP have treated the tribals as vote bank," Mr Yadav said seeking support for his candidate Vijay Hari, who is contesting from the seat.
JD(U) has stitched an alliance with CPI, CPI (Marxist), a tribal political outfit - Gondwana Gantantra Party (GGP) and Bahujan Sangharsh Dal, by fielding common candidate Mr Hari to take on the Congress and BJP.
The marriage of these parties, minus Congress, is akin to the Grand Alliance of Bihar which swept the Assembly polls there recently.
Mr Yadav said the by-elections are significant as an experiment like that of Grand Alliance, out of Bihar, is taking place across India.
"In Bihar, secularism triumphed," he said, adding that the Bihar Assembly polls result has sent a loud and clear message to people trying to divide the country of religious lines.
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.