The GOP is considered to be the party of free enterprise. So it surprised some how ferociously Republican presidential hopefuls attacked rival candidate Mitt Romney for his record at Bain Capital. Newt Gingrich accused Romney of “looting” companies and Rick Perry called him a “vulture capitalist.” Romney, the current GOP front-runner, did invite scrutiny with his boast of creating 100,000 jobs through Bain, his private equity firm. It’s a figure economists say is almost impossible to tally. Diane and her guests will explore the role private equity firms play in the U.S. economy.