While most gathered at CPAC this past weekend were busy gobbling up buffet-sized servings of Republican rage, one outsized commentator was left eating a slice of humble pie.Former USDA?official Shirley Sherrod has filed a lawsuit against conservative firebrand and web entrepreneur Andrew Breitbart. The suit stems from the notorious video Breitbart posted online last year, showing an out-of-context excerpt from a speech Sherrod gave to the NAACP Freedom Fund in March 2010. The clip suggested she ...