Virginia Electric Co. v. Board

Emphasizing that the Board's remedial power "is not limited to the illustrative example of one type of permissible affirmative order," such as backpay, and cautioning that the "particular means by which the effects of unfair labor practices are to be expunged are matters 'for the Board not the courts to determine'" (first citing Phelps Dodge, 313 U.S. at 187, 189; then quoting Machinists, 311 U.S. at 82)