More investment in “green” technology is shaping up to be a cornerstone of President Obama’s re-election effort, and the administration’s No. 2 man on Sunday accused Republicans of standing in the way of wind, solar and other renewable sources of energy. “They’re emasculating all the efforts to deal with renewable energy,” Vice President Joe Biden said Sunday in a prerecorded interview on CBS‘ “Face the Nation.” “They have no policy,” he said of Republicans, including the GOP presidential hopefuls who increasingly are making more U.S. oil and gas drilling a major campaign theme.