Bernie Sanders takes aim at 'greedy' Koch brothers

NORTH CHARLESTON, S.C. (AP) -- Democratic presidential hopeful Bernie Sanders is making the billionaire brothers Charles and David Koch the face of a "corrupted" political and economic system that the Vermont senator wants to upend. Sanders delighted a South Carolina rally of more than 3,000 people Saturday with his assertions that the Kochs and other "greedy" billionaires are destroying American democracy by infusing huge sums of cash into campaigns and election. The Vermont senator, who is pus...