Singh (54), who won Barmer's Sheo constituency as the BJP candidate in 2013 assembly elections, had announced at a rally last month that he is leaving the Bharatiya Janata Party.
Congress leaders claimed his move will help bring Rajput votes to the party-fold while the BJP said the MLA's politically wrong decision will have no impact on the ruling party.
Fateh Khan, the president of the Barmer unit of the Congress, said the Rajputs are not happy with the Vasundhara Raje government in Rajasthan.
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