Europe's leaders have considered "two-speed" integration—where select member states advance faster on key issues—to break deadlocks on competitiveness and security.The debate intensified in early 2026 with the launch of the so-called E6 grouping of Europe's largest economies. It is an informal coalition of the EU's six largest economies designed to accelerate decision‑making where unanimity has repeatedly failed.The Transatlantic Task Force at Beyond the Horizon, a Belgian think tank, called the shift a "ha ...