Leader of Opposition in Maharashtra Assembly Eknath Khadse would formally welcome Sangma to the city tomorrow morning.
As part of his campaign, Sangma is expected to address a meeting of BJP legislators and is also scheduled to address a press conference.
Khadse said he would request the Raj Thackeray-led Maharashtra Navnirman Sena (MNS) to support Sangma, who has been backed by the AIADMK, Biju Janata Dal and Bharatiya Janta Party (BJP), along with some other NDA allies.
On July 13, Mukherjee will be in Mumbai and is expected to meet Shiv Sena chief Bal Thackeray to express his gratitude for Sena's support to his candidature.
He will also address a gathering of legislators of Congress and Nationalist Congress Party (NCP) in south Mumbai.