If there’s one leader who has taken the lead in criticism of the exclusion of 40 lakh people in Assam from the draft NRC, it’s TMC chief and West Bengal Chief Minister Mamata Banerjee. But 13 years ago, as the lone Lok Sabha member of her party from West Bengal which was then ruled by the Left Front, Banerjee raised the issue of “infiltration into Bengal” 14 times within 22 minutes in the House.