The face-off between Pranab da and Chidambaram had started when as the home minister, Chidambaram had got a dossier made on Pranab’s son on how he liaisons for a big corporate house. Miffed at the same, Pranab da asked the ED, which is under his ministry, to rake up all the dirt against Chidambaram’s son Kartik and about all the share scams. Chidambaram is actually eyeing the prime minister’s post and knows that the biggest hurdle in his way is Pranab. The culmination of getting this hurdle out of the way was the bugging incident, which is now public, as is Pranab’s letter.