They don't need Teju to blackmail Chakor, they could threaten to kill Suraj or send him to prison and it's too early for the villagers to turn against Chakor, in this track they're united and they'll remain so until the end of it at least.
I prefer if Imli wins the elections by bribery than by having Chakor give in to her threats. I didn't like how Chakor was helpless against KN when he kidnapped the kids to force her to leave Suraj, I thought she should've tried to free them and here too I'd prefer Chakor to fight back instead of being helpless. Personally, I'd be pissed off with Chakor if she sacrifices the future of the whole village for Tejaswini, sometimes sacrifices should be made to reach your goal.
I don't know why Imli keeps Tejaswini or how they plan to use her.