When Mellon Bank Corp. decided to buy Dreyfus Corp. four years ago, its top lawyer knew the deal was legal but nevertheless feared the bank-mutual fund combination would stir a negative reaction on Capitol Hill.

So he turned to Karen Shaw Petrou, a financial industry consultant and consummate Washington insider, for expert help.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.