(REUTERS) Billionaire investor Warren Buffett on Monday campaigned alongside U.S. Democratic presidential candidate Hillary Clinton at a rowdy rally in his home state of Nebraska, where he challenged Republican Donald Trump to release his tax returns and questioned Trump's business acumen.
Trump, a New York real estate developer making his first run at public office, has said he cannot release his tax returns, a ritual of U.S. presidential campaigns, until the Internal Revenue Service has completed an audit.
“Now I’ve got news for him," said Buffett, whose Berkshire Hathaway conglomerate is based in Omaha. "I'm under audit, too, and I would be delighted to meet him anyplace, anytime, before the election.
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