The European Union today fined Google roughly $3.5 billion for violating its competition laws, a move that risks escalating tensions with the Trump administration. The European Commission, the executive branch of the 27-nation bloc, said Google had breached antitrust laws by using its size and dominance to control the display advertising business, undercutting rivals. The European Union's aggressive regulation of the tech industry has been a major source of contention with the United States.