President-elect Obama is also expected to tap billionaire Penny Pritzker to serve as Commerce secretary. Pritzker is a longtime friend of Obama’s and served as his national finance chair. Pritzker was involved in running and overseeing the Illinois-based Superior Bank, which collapsed in 2001. The bank has been described as being at the forefront of turning subprime loans into securities, the risky practice at the heart of the financial crisis.