Political scientist Alexandra de Hoop Scheffer, president of the German Marshall Fund, discusses the shifting transatlantic security landscape ahead of the NATO summit in Ankara on July 7 and 8. Amidst tensions regarding conflicts in Iran and Ukraine, the United States is transitioning from a policy of burden sharing to one of burden shifting. Although European allies and Canada increased defense spending by 20% in real terms in 2025 to reach $574 billion, meeting the 2% GDP threshold, the White House remains dissatisfied. Following the June 2025 summit in The Hague, where members committed to reaching 5% of GDP by 2035, the Trump administration continues to urge faster progress. This period represents a significant renegotiation of the transatlantic contract as Washington pressures European nations to increase their financial contributions to collective security.