Federal Housing Finance Agency Acting Director Edward DeMarco during testimony before Congress in December. Chip Somodevilla/Getty Images hide caption

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A sign for Freddie Mac in front of its headquarters in McLean, Va. Alex Wong/Getty Images hide caption

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Newt Gingrich is refuting new attacks about his role at mortgage giant Freddie Mac. Gingrich's reflection is seen here as he walks out mirrored doors in Tampa, Fla. to deliver remarks and greet supporters on Jan. 23. PAUL J. RICHARDS/AFP/Getty Images hide caption

itoggle caption PAUL J. RICHARDS/AFP/Getty Images