The United States’ security ties with Europe are fraying. Even before the war in Iran returned the Middle East to the front of policymakers’ minds, the United States was already shifting its focus away from Europe and toward deterring China in the Indo-Pacific. The move is occurring at a perilous moment, with Russia pressuring the continent from its eastern flank as it fights to subjugate Ukraine. As a result, Europeans feel increasingly compelled to take care of their own defense.