The Supreme Court today declined to refund a security deposit of Rs. 10 crore to Karti Chidambaram, son of former finance minister P Chidambaram, and asked him to "pay attention to his constituency" - Sivaganga in Tamil Nadu. Karti Chidambaram, facing several criminal cases, won from the Sivaganga parliamentary seat, traditionally a Congress stronghold, by a margin of over three lakh votes.