Newt Gingrich's campaign is pushing back against criticism that the former Speaker consulted with embattled mortgage lender Freddie Mac, insisting that Gingrich did not lobby on behalf of the government corporation. Gingrich was pressed on the ties during Wednesday evening's Republican debate — the Speaker was paid $300,000 in 2006 — but insisted that he only met with Freddie in his capacity as a historian, not as a lobbyist. "I have never done any lobbying," Gingrich said. "Every contract was written during the period when I was out of the office, specifically said I would do no lobbying, and I...