In a big setback to the Aam Aadmi Party, the CBI arrested Delhi Deputy Chief Minister Manish Sisodia in his second round of questioning on Sunday in the Delhi liquor policy case. Mr Sisodia will be produced in court on Monday afternoon. He is the second AAP minister to be arrested after Health Minister Satyendar Jain, leading to the question - is the central agencies' net tightening around the Aam Aadmi Party?