Soren addressed meetings at Udala, Sankhabahala, Bangiriposhi and Jamda under four Assembly constituencies of Mayurbhanj Lok Sabha seat.
"JMM is committed to safeguard the interest and development of tribals and strive hard to save them from being exploited", Soren said.
Belying expectations that JMM had been weakened in Mayurbhanj district after its state leadership had joined BJD in the run up to the twin elections, a large number of people attended these four meetings.
JMM state chief Sudam Marandi, district President Bhadav Hansda and state spokesman Krushnanda Mohanty had deserted the party along with their supporters to join BJD.
Soren did not say anything against Marandi, who was once considered his disciple, though all the contesting candidates accused him (Marandi) of 'back stabbing'.