Mukherjee, who will arrive in Jaipur tomorrow, will address a meeting of Congress MLAs in a city hotel.
The Congress has 102 MLAs in a 200-member House.
Two of its legislators -- Mahipal Maderna and Malkhan Bishnoi -- are lodged in jail in connection with infamous Bhanwari Devi abduction and murder case.
The party also enjoys the support of 10 independent MLAs.
Yesterday, Mukherjee wooed MPs and MLAs belonging to the Samajwadi Party and the BSP in politically-crucial Uttar Pradesh.
Both the parties had pledged their support to Mukherjee.
