Mamata Banerjee's Trinamool Congress has lost third MLA in just two days. Party MLA Shilbhadra Dutta quit on Friday morning. Suvendu Adhikari and Jitendra Tiwari had handed in their resignations on Thursday and both are expected to join the BJP anytime now. The back-to-back exits come just ahead of home minister Amit Shah's visit to Bengal on Saturday.