Dominique Strauss-Kahn, the former IMF chief, has been described as "mentally ill" by Michel Rocard, France's highly respected former prime minister. The 81-year-old elder statesman of the Socialist party delivered his damning verdict in a live TV interview on Monday night. Mr Rocard - French prime minister from 1988 to 1991 - said it was “clearly medical problems” that drove Mr Strauss-Kahn to become embroiled in repeated sex scandals. The 63-year-old former head of the International Monetary Fund was recently freed from charges of trying to rape a hotel chambermaid in New York. Guinea-born maid Nafissatou Diallo, 32, has launched...