Ranchi: Chief minister Hemant Soren and four former CMs will canvass for BJP and Trinamool Congress in the poll-bound West Bengal in the coming weeks. Union tribal affairs minister and ex-CM Arjun Munda on Friday began his three-day electioneering trip in West Bengal, campaigning for Gouri Singh Sardar, BJP’s candidate in the Manbazar (ST) assembly constituency under Purulia district. He is expected to tour a few more ST assembly seats in the region that will go to the hustings on March 27. While Munda is already on the campaign trail, former CM Raghubar Das is expected to begin canvassing on Monday. Das, the only CM in Jharkhand to complete five years in office, was appointed BJP’s national vice-president last year. It has not been decided where Das will campaign in the first phase.