After more than a week of ratcheting up tariffs on products imported from China, the Trump administration issued a rule late Friday that spared smartphones, computers, semiconductors and other electronics from some of the fees, in a significant break for tech companies like Apple and Dell and the prices of iPhones and other consumer electronics. A message posted late Friday by U.S. Customs and Border Protection included a long list of products that would not face the reciprocal tariffs President Trump imposed in recent days on Chinese goods as part of a worsening trade war. The exclusions would also apply...