Warren Buffett tells CNBC's Becky Quick, with his familiar laugh, that he was able to replace Microsoft's Bill Gates as the world's richest person because he "spends less."  In a brief off-camera telephone chat about Forbes' new list of global billionaires, with Buffett and his estimated $62 billion in the top position, the Berkshire Hathaway chairman joked that "it's a tribute to thriftiness."    Read More

Warren Buffett is now the world's richest person, topping the just-released Forbes 2008 ranking of global billionaires, with an estimated wealth of $62 billion.  He bumps Microsoft's Bill Gates from the number one spot, a position Gates held for 13 consecutive years.  Mexico's Carlos Slim is number two.   Read More

Warren Buffett hosted a fund-raiser today in San Francisco for Senator Hillary Clinton's presidential campaign. Here's a video excerpt.   Read More

Warren Buffett's high-profile visit to Washington last week is generating some criticism from some of those opposed to his "Tax the Rich" campaign.  Here's a sampling.   Read More

Check out this web-only video clip showing some behind the scenes shots after today's appearance by Warren Buffett before the Senate Finance Committee, including a long walk down the hallway and an elevator that "doesn't stop for billionaires."   Read More

Video clip and transcript of Warren Buffett's opening statement before the Senate Finance Committee holding a hearing on estate taxes.   Read More

This is live real-time blog coverage of Warren Buffett's appearance before the Senate Finance Committee for a hearing on estate taxes.   Read More

Warren Buffett has arrived here in Room 215 of the Dirksen Senate Office Building, ready for his  appearance a little later this morning before the Senate Finance Committee.  The guards are saying a big crowd is expected.  No surprise when Buffett's involved.   Read More

Warren Buffett will be heading to Washington next Wednesday, to testify against eliminating the nation's estate taxes.  It appears to be part of Buffett's "billionaires like me don't pay enough in taxes" campaign, which has not exactly caught on among his fellow members of the Forbes 400 club.    Read More

Some of Warren Buffett's fellow bilionaires in the Forbes 400 speak out on his million-dollar challenge over tax rates and the very wealthy.  So far, no takers.   Read More