MR. BRAIN HAS WORKED FOR A NUMBER of heavyweights, including two powerful Democratic chairmen of the House Ways and Means Committee: Reps. Dan Rostenkowski and Charles Rangel. He also served as director of legislative affairs for President Clinton. Mr. Brain founded Capitol Hill Strategies in 2003 and has represented dozens of clients—sometimes to the chagrin of former colleagues who oppose his efforts. His firm has been hired by numerous Wall Street and business outfits, including the Business Roundtable, Delta Air Lines, Merck, Wachovia and Citigroup. He’s been at the center of both the health and financial reform lobbying efforts, representing pharma-ceutical and medical device trade associations and the National Venture Capital Association, among others.