Baijayant Jay Panda, who quit Biju Janata Dal (BJD) last year, joined Bharatiya Janata Party on Monday.
Panda won Kendrapara Lok Sabha constituency in 2014 and represented it, before leaving BJD.
His bitter relationship with Odisha Chief Minister Naveen Patnaik led to his suspension from BJD. He later handed over his resignation in Lok Sabha as well.
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Will work under PM Modi, says Panda announcing switch
Announcing the decision on Twitter, Panda wrote he consulted colleagues and the general public for nine months.
Panda said he will work under the leadership of Prime Minister Narendra Modi to serve Odisha and India to best of his ability.
55-year-old Panda has been a parliamentarian since 2000 and is one of the most popular leaders in Odisha. His decision will surely dampen BJD's prospects.
After months of speculations, Panda finally joins BJP
Nine months of introspection widespread consultations w/colleagues public. Grateful for support recd from all over. On auspicious #MahaShivratri I've decided to join @BJP4India work under the leadership of @narendramodi Ji to serve Odisha India to the best of my ability🙏