In case there was any doubt, the results of Saturday's South Carolina primary proved there's a proxy war going on in the Republican Party. While casual observers may see a battle between former Massachusetts Governor Mitt Romney and former Speaker of the House Newt Gingrich, the real fight is between a party establishment that believes only a moderate can win in November and conservatives who want to block a moderate from winning the nomination. After the first three official contests, three different candidates have scored a victory and the fourth showed well enough to stay in the fight. Far from...