"What we have taken for granted for decades no longer exists," Mark Leonard says in a wide-ranging conversation at the London headquarters of the European Council on Foreign Relations with Marc López Plana, editor and director of 'Agenda Pública', and Toni Timoner, Board member at 'Agenda Pública'. This is a long but essential interview, offered exclusively to our readers. The ECFR’s director examines how Donald Trump has fractured the transatlantic alliance and what this means for Europe and the wider world. Leonard reflects on the erosion of trust in the United States, the rise of China, the reshaping of European power, and the strategic challenges facing Europe in defence, trade and migration.