Such efforts will likely be influenced by a growing awareness on Capitol Hill and among nongovernmental groups of this potent new source of U.S. foreign-policy leverage and a recognition that it can be exploited largely without the collateral damage to U.S. interests (harm to exports and jobs) inflicted by trade sanctions.
The closeness of Anglo-American military and intelligence ties, driven by the cold war, became a defining feature of British foreign policy and a source of tension between Britain and France, which led de Gaulle twice to veto British membership of the then European Economic Community, on the grounds of Britain's irremediable Atlanticism.