COLUMBIA, South Carolina (Reuters) - Republican presidential candidate Newt Gingrich trounced frontrunner Mitt Romney in South Carolina on Saturday in a jarring victory that indicates the party's battle to pick a challenger to President Barack Obama may last months, not weeks.
Gingrich's come-from-behind triumph in the primary in the conservative southern state injects unexpected volatility into a Republican nominating race that until this week appeared to be a coronation for Romney, the former Massachusetts governor and private-equity chief.