The Enforcement Directorate (ED) has questioned Congress MP Karti Chidambaram for the second time in less than a month in connection with a money laundering case. The case relates to the alleged violation of rules in issuing visas to 260 Chinese nationals in 2011 under the UPA government. Karti’s father, P Chidambaram, was the Union home ministry head at that time. The CBI had filed an FIR in the case, alleging that bribes were received for lobbying for the visas. The ED had also conducted search and seizure operations in the case.