After drawing a bearish brokerage note from Fox-Pitt this morning, Citigroup (C: sentiment, chart, options) is back in the crosshairs this afternoon. Robert Rubin, President Clinton's former Treasury Secretary, announced plans to leave the company following criticism of his role in the financial crisis, the Wall Street Journal reported late this afternoon. Rubin is senior counselor and a director at Citi.

The company's recent troubles, such as $20 billion in losses during the past year and the necessity of a government bailout totaling nearly $45 billion, have brought a great deal of unwanted attention to Rubin. The Citi director has received $115 million in pay since 1999, excluding stock options, says the Journal. But Rubin has defended his performance, insisting that Citi's problems stem from broader issues in the financial system.

As for leaving Citigroup, Rubin is reportedly "tired of it," and wants to focus on nonprofit work and other interests instead.

Citi shares accelerated their losses on the day following the news. At last check, the stock was off more than 4%.