(Adds details of appointment, company's response)
July 21 (Reuters) - Goldman Sachs Group Inc's (GS.N) Ken Wilson will temporarily leave the firm to advise U.S. Treasury Secretary Henry Paulson on how to resolve the country's banking crisis, the Wall Street Journal said.
Goldman's most senior financial-institutions banker, who has played a big role in capital raisings and reorganizations, will join Paulson to address issues from a broader perspective, the paper said, citing people familiar with the matter.
The move comes as the Treasury and the Federal Reserve grapple with issues including the threat of bank failures, alarming capital levels and a crisis of confidence in important institutions such as Fannie Mae FNM.N and Freddie Mac FRE.N.
U.S. President George W. Bush made a personal call to Wilson in recent days, asking him to assist Paulson, the paper said.
Wilson is expected to serve without pay in a period through January, the paper said.
Goldman spokesman could not be immediately reached for comment. (Reporting by Dhanya Skariachan in Bangalore; Editing by Tomasz Janowski)