West Bengal Chief Minister Mamata Banerjee, who has been working hard at projecting herself as the prime ministerial candidate for the united Opposition in 2019, is scheduled to arrive in Delhi on July 31. During her three-day stay in the capital she is expected to “personally meet and invite” Opposition leaders to the “federal front” rally she plans to hold in January in Kolkata. In her last few visits to Delhi, she made it a point to meet the leaders of regional and Opposition parties as part of her efforts to cobble up support for the “federal front”. “Everyone is