"I will move heaven and earth to ensure that Shiv Sena wins the Dadar assembly constituency," party president Uddhav Thackeray said.
"This is a promise I gave my father late Balasaheb Thackeray. Come what may, I will ensure that the Sena regains the Dadar constituency," Uddhav said at a public interaction in Dadar.
Assembly elections in Maharashtra are due next year.
In a veiled reference to estranged cousin and Maharashtra Navnirman Sena (MNS) chief Raj Thackeray's criticism of his clap remark, Uddhav said, "Now I am afraid to clap with anyone."