A sculpture of a raised middle finger greets visitors to the elegant offices of Margrethe Vestager, the most powerful woman in Brussels. It is a reminder, from a disgruntled lobby group in her native Denmark, that tough decisions come with the territory. One hundred days into her new job, Europe’s antitrust chief is preparing a series of politically explosive decisions involving some of the world’s biggest companies, including Google Inc., Apple Inc. and Amazon.com Inc. Perhaps her most incendiary case is a 2½-year-old probe into Russian energy company Gazprom OAO . In an interview, Ms. Vestager said she will move against the state-owned company shortly despite the Ukraine crisis, opening up the possibility of multibillion-dollar fines. “I think we can […]