Why SIR Has Sparked Backdoor NRC Fear Within Trinamool Congress?

Mamata Banerjee criticizes the ECI's SIR, calling it an NRC "backdoor" attempt targeting Bengal after Bihar. She vows a "Gherao movement" against the electoral roll revision, while the BJP dismisses her concerns as "drama."  

Why SIR Has Sparked Backdoor NRC Fear Within Trinamool Congress?
Mamata Banerjee criticizes the ECI's SIR, calling it an NRC "backdoor" attempt targeting Bengal after Bihar. She vows a "Gherao movement" against the electoral roll revision, while the BJP dismisses her concerns as "drama."