Subramanian Swamy, who wants P Chidambaram to be investigated for his alleged role in the telecom scam, today made new allegations of corruption against the Union Minister's son, reports NDTV. In a three-page letter dated April 24 to the Prime Minister, Swamy has said that Chidambaram should be asked to resign as Home Minister and that the CBI should include him and his son, Karti, in its investigation on the sale of telecom Aircel to Malaysian-based Maxis.