– War on the Rocks – The 2017 National Security Strategy is a statement of Trump administration priorities, and its central tenets can be directly traced to statements made by Donald Trump on the campaign trail, albeit now framed in more genteel terms. National security experts are busily analyzing the strategy to discern its insights, pivots, oversights, inconsistencies, and priorities. This essay, however, concerns itself solely with the strategy’s implications for American seapower.