Jan. 23 (Bloomberg) -- As presidential hopeful Newt

Gingrich faced new criticism from rivals for his advisory role

at Freddie Mac, the consulting firm he founded released today a

copy of a consulting agreement he signed in 2006 with the

mortgage company.

The 16-page document does not specify what Gingrich did in his role as a consultant, and it only covers one year of his multi-year services.

Gingrich earned at least $1.6 million working with Freddie Mac during an eight-year period beginning in 1999. The contract released tonight covered 2006, a year in which he was to be paid $300,000.

‘The contract was solely for consulting purposes and not lobbying,’’ a center statement said.

To contact the reporter on this story: Clea Benson in Washington at cbenson20@bloomberg.net

To contact the editor responsible for this story: Jeanne Cummings at jcummings21@bloomberg.net