Former Massachusetts Gov. Mitt Romney, a GOP presidential hopeful, holds a discussion on housing and foreclosure in Tampa, Fla., on Monday. Mr. Romney slammed former House Speaker Newt Gingrich for his work with Freddie Mac and called on him to release records from an ethics investigation. (Associated Press)

Former Massachusetts Gov. Mitt Romney, a GOP presidential hopeful, holds a discussion on housing and foreclosure in Tampa, Fla., on Monday. Mr. Romney slammed former House Speaker Newt Gingrich for his work with Freddie Mac and called on him to release records from an ethics investigation. (Associated Press)