I am a mariner. My career has been spent on the water, on American vessels, in American ports, with American crews. That is the job. It has always been, to me, the definition of an “America First” industry, long before that phrase entered the political vocabulary. The news that President Donald Trump is moving to reopen the Strait of Hormuz lands with particular weight for those of us who make our living on American waterways. The disruption that justified waiving the Jones Act is ending.