Billionaire Warren Buffett is a thorn in the side of Republicans. This pillar of the capitalist community and CEO of the corporate conglomerate Berkshire Hathway, continues to press Congress to raise taxes wealthy people like him. When congressional Republicans answered him by proposing a voluntary check-off box on tax-filing forms for people who want to pay more taxes, Buffet threw down a gauntlet. He’d happily match the voluntary tax contributions made by GOP lawmakers, he said — and he’d even triple-match those made by Senate Majority Leader Mitch McConnell.