President Trump has now imposed his new tariff regime on the world, and the triumphalism is palpable in MAGA land. But maybe hold the euphoria, as this week’s reports on jobs and the economy suggest the new golden age may take a while to appear. Friday’s labor report arrived with a particular jolt, with a mere 73,000 net new jobs in July. Even more bearish were the downward revisions of 258,000 jobs in May and June. Job gains over the last three months are barely more than 100,000. The details in the report provide little solace. The jobless rate ticked...