In this Feb. 17, 2011 photo, Las Vegas Sands Corp. Chief Executive Sheldon Adelson addresses the media during the grand opening ceremony of the Marina Bay Sands in Singapore. Casino billionaire Adelson spent more on the 2012 federal elections than any other donor, putting up about $90 million of his family's money. His willingness to make a huge political investment helps explain why his signature group, the Republican Jewish Coalition, has attracted all of the major GOP presidential candidates to its forum Thursday, Dec. 3, 2015 in Washington - even though the man himself won't be among the 700 people in attendance. (AP Photo/Wong Maye-E, File)
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