TMC leader Ajmal Siddique on Saturday resigned from all party posts, including the post of State Secretary (Minority Cell). "The party is collapsing today solely because of one man, TMC MP Abhishek Banerjee [and his] dictatorial attitude," Siddique said. "This party brings nothing but disrepute...majority of its members are involved in unsavoury activities...scandals keep surfacing," he added.