West Bengal Chief Minister and All India Trinamool Congress (TMC) chief Mamata Banerjee on Wednesday met United Progressive Alliance (UPA) Chairperson Sonia Gandhi and made it clear that the Congress was a must for any one-on-one fight with the Bharatiya Janata Party (BJP), and that the Opposition party could not be excluded from any anti-BJP alliance in the Lok Sabha elections 2019. The view is that parties dominant in a state will take the lead in putting up a one-to-one fight against the ruling alliance in the general elections 2019. Banerjee also met Delhi Chief Minister Arvind Kejriwal and received