Obama rejects criticism of his agenda as "socialism" Photo 3:22pm EST By Jeff Mason and Caren Bohan WASHINGTON (Reuters) - President Barack Obama launched a vigorous defense of his economic agenda on Wednesday, rejecting critics who call his policies "socialism" and insisting he aims to boost U.S. competitiveness abroad. Speaking to the Business Roundtable, which groups some of the country's top chief executives, Obama called for support of his administration's efforts to overhaul financial regulation, revamp the health insurance industry and create jobs. "Contrary to the claims of some of my critics and some of the editorial pages, I am...