Warren Buffett Pictures

LeBron James' friend Maverick Carter (L) and Warren Buffett joke around courtside with Buffett's wallet during the 2008 State Farm Basketball Challenge exhibition game between the USA Basketball Men's Senior National Team and the Canadian Senior Men's National Team at the Thomas & Mack Center July 25, 2008 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images North America)

Billionaire investor Warren Buffett talks as Democratic presidential hopeful Hillary Clinton listens onstage at a fund-raising event December 11, 2007 in San Francisco, California. The junior U.S. senator from New York was joined by Buffet, who has not endorsed Clinton and has also hosted a fundraiser for Clinton's chief rival for the Democratic nomination, Sen. Barak Obama of Illinois. Buffet has called both candidates 'presidential.' (Photo by Justin Sullivan/Getty Images News)