The EU diplomat wooing and warning Silicon Valley

Gerard de Graaf opened the European Union’s first San Francisco office nearly a year ago, making him the bloc’s de facto ambassador to the U.S. tech industry. His position is part cop, part counselor, part hype man. De Graaf speaks with Steven Overly about the EU’s ambitions in Silicon Valley and what has surprised him most about the place, including CEOs who are more comfortable with regulation than their lobbyists suggest.