New Delhi: An air of quiet confidence pervades the Trinamool Congress office here as the party headed by “Didi”, West Bengal Chief Minister Mamata Banerjee, makes a determined bid to go national and become a major player in government formation. The party is contesting 100 seats across India this time and is aiming to win “35 plus seats”, to become, in Banerjee’s own words, the “third largest party” in India.