E-mails and other records of Dr. Eric Whitaker -- one of President Obama's best friends -- have been subpoenaed by a federal grand jury... The investigation involves "faith-based initiatives" and health-awareness campaigns funded by the Illinois Department of Public Health when Whitaker ran the agency for former Gov. Rod Blagojevich... Obama has said he recommended Whitaker for that job, which Whitaker landed in April 2003. The president's friend resigned in October 2007 to join Obama's wife, Michelle, as an executive at the University of Chicago Medical Center. On Friday, Whitaker defended his work as the state's former top health official,...