The revolt in the Congress as represented by the letter written by 23 senior leaders to interim President Sonia Gandhi is by no means the first but it comes at a time when the 135-year-old party is at its lowest point in post-independence history, a performance roughly synchronous with Rahul Gandhi’s rise within the party to, first, vice-president-ship (in 2013) and then president-ship (2017). The unacknowledged fact is that Mr Gandhi, 50, lies at the heart of the rebels’ dilemma. He stepped down over a year ago, owning responsibility for the election debacle, and his mother, Sonia Gandhi, 73, took