Rane's tour is being seen a major show of strength by the BJP ahead of the crucial BMC polls, due early next year.
The Sena said Rane will lose by even greater margin if he contests the elections for the third time.
The assembly by-poll elections yielded good results for BJP allies.
The All India Majlis-e-Ittehadul Muslimeen, which had won two seats in the state Assembly election held last year, is planning to contest the by-poll to the Bandra Assembly seat and election to the Navi Mumbai and Aurangabad municipal corporations on secular and development plank.
'The BJP is spreading slow poison in India. The effect will not be seen now, but after 10 years you will see it for sure.'