Plot: 2012/01/24 Headlines: Romney, Gingrich Spar in Florida Debate; Gingrich Reported to Freddie Mac Lobbyist; Romney Paid Low Rate on Millions in Investment Income; Another $5 Million Pledged to Pro-Gingrich Super PAC; Santorum, Paul Claim Conservative Mantle; Obama to Deliver State of the Union Address; Supreme Court Rules Warrants Required for GPS Tracking; Ex-CIA Whistleblower Charged with Leaking Classified Information; Last Marine Charged in Haditha Massacre Reaches Plea Deal; 6 Killed in Iraq Bombings; Egypt Opens New Parliament, Prepares to Mark Revolution; U. S