From Paul Mirengoff's post in PowerLine:
The plaintiffs are represented by Boyden Gray of Boyden Gray & Associates, along with the firm of O’Melveny & Myers and the Competitive Enterprise Institute. Gray served as White House Counsel under the first President Bush. Hans Bader, a Power Line reader with whom I have communicated over the years, is on the pleadings as one of the counsel for the Competitive Enterprise Institute.
Source URL: http://cei.org/citations/major-lawsuit-challenges-constitutionality-dodd-frank