Gingrich's Billionaire Backer Coughs Up Yet More Dough 'Substantial' contribution made to pro-Newt super PAC By Evann Gastaldo, Newser Staff Posted Feb 28, 2012 8:16 AM CST 25 comments Comments In this June 7, 2011 file photo shows Las Vegas Sands Chairman and CEO Sheldon Adelson waves in Hong Kong. (AP Photo/Vincent Yu, File) (Newser) – Sheldon Adelson has injected yet more money into the super PAC supporting Newt Gingrich's presidential campaign. The billionaire casino owner donated another "substantial" amount to Winning Our Future, helping it to air new TV ads in seven states starting today, the AP reports. A source says the new contribution is similar to two earlier contributions of $5 million each from Adelson and his family. Adelson recently said he may give up to $100 million in support of Gingrich.