The state BJP unit, however, maintained that the district president was expelled for his anti-BJP activities and named Arupananda Sahu as his replacement.
Sahu met Biju Janata Dal (BJD) president and chief minister Naveen Patnaik at his residence early in the day, before announcing the decision.
"The BJP is a party that lacks ideology. My selfless dedication towards the party from 1997 to 2017 was of no value. So, I decided to join the BJD," he told reporters.
"Even Biju Babu had offered me ticket when I was with the Janata Party (BJD). I believe in selfless work and service to people. Joining the party is more like a homecoming for me," Sahu said.
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Meanwhile, BJP state president Basant Panda in a statement said Sahu has been expelled from the party for his anti-party activities and his ouster will have no impact on the bypolls.
Rejecting Sahu's allegations, Panda said, "The BJP doesn't depend on any one individual but respects its party workers. It (Sahu's exit) will have no impact on the party's prospects in the ensuing bypoll in Bijepur."
Bargarh district comprises five assembly constituencies including Bijepur. The bypoll was necessitated following the death of Congress MLA Subal Sahu in August. The Election Commission is yet to announce the date for the bypoll.
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