There’s a new sheriff at the National Labor Relations Board, and after a few months as the board’s general counsel—its first GC with Senate approval since 2010—Richard Griffin Jr. has come out with guns blazing.

For his first major complaint, Griffin chose to take on the most high-profile of adversaries, Wal-Mart Stores Inc. In challenging the country’s largest retailer, Griffin is armed not just with legal arguments. He has the legitimacy of a board that was confirmed by the Senate and is untainted by the recess appointments that dogged the previous board.