Sheldon Adelson and his wife, Miriam, gave $92.8 million to conservative superPACs and related groups in the 2012 election, according to the Center for Responsive Politics.
People stand with signs on Capitol Hill as Senate and House Democrats called for an amendment to the Constitution aimed at curbing special interests' financial clout in elections.
J. Scott Applewhite/AP
The Ricketts family poses on the Chicago Cubs field in 2010, a year after they bought the team: Laura Ricketts (from left), Joe Ricketts, Marlene Ricketts, Todd Ricketts, Tom Ricketts and Pete Ricketts.
Nam Y. Huh/AP