Warren Buffett, chairman and chief executive of BerkshireHathaway, said Wednesday that the threat of not raising the U.S.debt ceiling is a political weapon.

The idea that Congress could fail to raise the $16.7 trillionU.S. borrowing limit is a "political weapon of mass destruction,"Buffett told cable television network CNBC.

Buffett also said that his firm's spending rate this year,particularly in reference to acquisitions, is as "high as ever,"and that his firm missed an "elephant" acquisition recently thatwould have exceeded $12 billion.

Buffett said Berkshire Hathaway owns short-term Treasury billsand is "not worried" about the bills being paid, despite concernsabout the U.S. debt ceiling.

U.S. Treasury Secretary Jack Lew has said the United Stateswillexhaust its borrowing authority no later than Oct. 17.

While discussing his firm's investments in Bank of America Corpand JPMorgan Chase & Co, Buffett said "the banks are in thebest shape I can remember."

Regarding his stake in International Business Machines Corp,Buffett said he felt "fine" about his firm's investment in thecompany and has bought some additional shares this year.