Agriculture Secretary Tom Vilsack this afternoon took responsibility for firing an official, Shirley Sherrod, whose appearance on video recalling her behavior toward a white farmer drew charges of racism, and whose immediate firing drew suggestions that the administration had over-reacted to an edited video clip. A White House official told me just now that the White House backs Vilsack's decision -- but that it was Vilsack's alone. The official said the White House -- contrary to the Sherrod's charge -- did not pressure the Department to fire her. Vilsack's statement: Yesterday, I asked for and accepted Ms. Sherrod’s resignation for...