Policymakers on both sides of the Atlantic now frame China primarily not as an opportunity but as a challenge or threat. In recent research with colleagues at the U.K.’s leading foreign policy think tanks — Chatham House and the Royal United Services Institute — into transatlantic cooperation on China, we found consensus on the need for de-risking; on the desire to maintain the security status quo in the Indo-Pacific; and on the need to counter China’s actions on the world stage and its