In the 2019 general elections, the BJP had won 23 Lok Sabha seats in the state.
He was the former Chief Minister of Maharashtra.
Abhishek (40), son of former MLA Vinod Ghosalkar, a loyalist of the Uddhav Thackeray-led party, was shot at by Mauris Noronha in his office.
The assailant, who accompanied Abhishek on Facebook live, later committed suicide.
Kalyan MLA Ganpat Gaikwad of BJP opened fire on Mahesh Gaikwad, the Shiv Sena chief of Kalyan, inside the chamber of the senior inspector of Hill Line police station.
The ruling further cemented Shinde's position as the chief minister, 18 months after he led a rebellion against Thackeray, and added to his political heft in the ruling coalition.
Addressing the media after joining Shiv Sena, Deora said the Congress today has only one goal - speak against whatever PM Modi says and does.
The speaker also held that the Shiv Sena pramukh' (chief) did not have the power to remove any leader from the party.
SC sets December 31 deadline for Maharashtra speaker to decide on disqualification petitions
The development comes a day after Narwekar said he has received a copy of the Shiv Sena's constitution from the Election Commission of India.