"Super PAC" for Gingrich to Get $5 Million Infusion A wealthy backer of Newt Gingrich will inject $5 million into a "super PAC" supporting his presidential bid, a person with knowledge of the contribution said on Monday, providing a major boost to Mr. Gingrich as he seeks to fend off aggressive attacks from Mitt Romney, his main Republican rival. The supporter, Dr. Miriam Adelson, is the wife of Sheldon Adelson, a longtime Gingrich friend and patron who contributed $5 million to the super PAC, Winning Our Future, this month. Dr. Adelson's check will bring the couple's total contributions to Winning Our Future to $10 million, a figure that could substantially neutralize the millions of dollars already being spent in Florida by Mr. Romney and Restore Our Future, a super PAC backing him. Mr. Adelson's initial check financed a high-powered barrage of negative ads against Mr. Romney in South Carolina, helping Mr. Gingrich to a shocking victory in Saturday's Republican primary there. But those attacks, which focused on Mr. Romney's wealth and career in the private equity business, also drew condemnation from many conservatives, who said that Mr. Gingrich's allies were undercutting free-market capitalism and amplifying class-warfare arguments being made by Democrats and Occupy Wall Street demonstrators. In making the couple's second $5 million contribution, Dr. Adelson expressed a wish to officials at Winning Our Future that the money be used "to continue the pro-Newt message," the person said, rather than attacks on Mr. Romney. The Adelsons" contributions on Mr. Gingrich's behalf illustrate how rapidly the era of unlimited political money is reshaping the rules of presidential politics and empowering individual donors to a degree unseen since before the Watergate era. The wealth of a single couple has now leveled the playing field in two critical primary states for Mr. Gingrich, a candidate who ended September more than a million dollars in debt, finished out of the running in Iowa and New Hampshire, and, unlike Mr. Romney, has yet to attract the broad network of hard-money donors and bundlers that traditionally propel presidential campaigns. The contribution underscored how the traditional advantages built by Mr. Romney's campaign, including a potent get-out-the-vote operation in Florida and campaign contributions raised in chunks of no more than $2,500, are being challenged by new forces, including the high-profile debates that have defined the campaign and the emergence of new campaign finance rules in the wake of the Supreme Court's landmark Citizens United ruling. Rick Tyler, a longtime Gingrich aide who is now a senior adviser for Winning Our Future, declined to comment on the contribution. But the prospects of the group getting another cash infusion from the Adelsons appeared to be in question as recently as Sunday night, when Mr. Tyler said he would like to spend $10 million in Florida to aid Mr. Gingrich but did not yet have the resources to do so. Indeed, early Monday, as Mr. Romney and his allies signaled the start of an aggressive anti-Gingrich effort in Florida, Winning Our Future placed only a small, short-term advertising buy in the state: $392,000, relatively little in a state with large numbers of expensive media markets. Dr. Adelson's contribution came after days of public and private pressure from allies of Mr. Romney, who hoped to stem the flow of money to Mr. Gingrich and viewed Mr. Adelson's continued help as potentially devastating to Mr. Romney's chances. One of Mr. Romney's chief backers, former New Hampshire governor John H. Sununu, referred to Mr. Adelson in a recent television interview as "not so bright" and suggested he would face retribution from investors in his casino empire. Does he think people don't remember when you attack them and pay for the attacks in the primary? Especially when one of the parties receiving that attack is the same investment community that he likes to go to finance his expansions? Mr. Sununu said. Just how dependent Winning Our Future is on the Adelsons" money is impossible to say. Federal Election Commission rules do not require Winning Our Future and other candidate-specific super PACs to publicly report donors until Jan. 31 - the same day as the Republican primary in Florida. Through Monday, the group had reported spending $3.9 million in the early primary states, three-quarters of it on advertisements attacking Mr. Romney. Restore Our Future, the super PAC supporting Mr. Romney and run by a trio of his former aides, has spent far more: About $11.1 million through Monday, including millions of dollars spent against Mr. Gingrich in Iowa on ads that are widely credited with crippling his campaign there. It is unclear whether the group has yet attracted contributions at the Adelsons" level; through the end of June, when it filed a midyear disclosure report with the election commission, the group's largest donors had given checks of $1 million. Jeremy W. Peters contributed reporting.