CONWAY, S.C. (AP) -- Looking beyond an expected win in New Hampshire, Republican presidential hopeful Mitt Romney reached out to South Carolina voters Friday with a two-track argument that President Barack Obama has mishandled the economy and devised an "inexcusable, unthinkable" plan to shrink the U.S. military. His GOP rivals kept up an anti-Romney drumbeat in New Hampshire, hoping to chip away at his support and slow his momentum....