All eyes are on Michigan and Arizona today, but another big cash injection from billionaire casino mogul Sheldon Adelson has helped Newt Gingrich keep his gaze trained on the March 6 Super Tuesday primaries.

An anonymous source confirmed to the Associated Press that Adelson has given a substantial amount of money to the pro-Gingrich super PAC Winning Our Future. Adelson has already played an outsize role in furthering Gingrich's presidential ambitions, giving about $7.7 million to the political action committee that helped launch Gingrich's run and with his wife Sheila giving a combined $10 million to Winning our Future.

Super PAC's are allowed to accept unlimited amounts of donations. Although they are legally prohibited from coordinating with campaigns, Super PAC's have helped shape the 2012 Republican presidential primary by airing a deluge political advertisements, many of them negative.

That will be the case with Winning the Future, which will benefit from Adelson's generosity by airing ads in Georgia, Ohio, Oklahoma and Tennessee, all of which are voting on Super Tuesday. While Mitt Romney and Rick Santorum have been locked in a bruising battle for Michigan, Gingrich has focused on picking up Super Tuesday wins in southern states where he is strongest.

Gingrich has vowed to remain in the race, insisting he has a potential path to the nomination despite failing to pick up a win since his resounding victory in South Carolina. Even if Gingrich does not pile up enough delegates to secure the nomination, his continued presence in the race could be a disruptive force, particularly by denying Romney a decisive Super Tuesday win.