Kumar, who lost last elections to JD(U)'s Sushil Kumar Singh, is facing his old rival once again, the only change being that Singh recently switched over to BJP and is now riding the Narendra Modi bandwagon.
Though Kumar hopes to benefit from Congress' alliance with Lalu Prasad's RJD, the growing support for Modi in Bihar is likely to make the going tough for him.
Due to the overwhelming presence of the Rajput community, Aurangabad is popularly referred to as the 'Chittorgarh of Bihar'. Nikhil Kumar's late father represented the seat seven times since Independence.
Nikhil Kumar and Sushil Kumar Singh, both belonging to the dominant Rajput caste, have been old rivals in electoral battles in Aurangabad.
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In 1999, Kumar's wife Shyama Singh defeated Singh while Kumar himself trounced him in 2004. But Singh avenged that loss in 2009.
This time, JD(U) has fielded Baggi Kumar Verma, who recently switched to the party from RJD. Verma would be eyeing votes of the backward Kushwaha and Extremely Backward Caste and Mahadalits besides Muslims.
Nikhil Kumar, who left the Kerala governorship to fight the polls, is facing complaints that he is cut off from the common man. "He rarely comes to Aurangabad and even when he is in town, it is difficult to meet him for solutions to local problems," said Krishna Singh, an Aurangabad resident.