COLUMBIA, S.C. – Voters battled rainstorms and tornado warnings as they streamed to the polls here today, capping a tumultuous and at times politically dizzying week of events that, by tonight, could potentially reshape the Republican presidential nomination process once more. Extending a more aggressive phase of his campaign, Mitt Romney today renewed attacks on Newt Gingrich, calling on the former House speaker to release records related to his role consulting Freddie Mac, the quasi-public lending agency that many blame for accelerating the housing crisis. “I’d like to see what he actually told Freddie Mac,” Romney told reporters after visiting...