The recent death of television mogul John Kluge brings the number of billionaire deaths in 2010 to five, providing additional resources to wage a constitutional fight against any retroactive imposition of the estate tax:
- Mary Janet Cargill (Feb. 5, 2010)
- Dan L. Duncan (Mar. 28, 2010)
- Walter Shorenstein (June 24, 2010)
- George Steinbrenner (July 13, 2010)
- John Kluge (Sept. 7, 2010)



