A transition adviser to President-elect Barack Obama earned millions of dollars overseeing an office that led a lobbying effort to prevent increased oversight of mortgage giant Fannie Mae, the company at the heart of the ongoing turmoil in the nation's financial markets, public records show. The unpaid adviser, Thomas E. Donilon, held several senior positions at Fannie Mae from 1999 to 2005, including vice president of law and policy, at a time when the company's officers and lobbyists were insisting that now-troubled Fannie's finances were sound. In a 2006 report, the Office of Federal Housing Enterprise Oversight (OFHEO) said Fannie...