Crypto miners in the US are experiencing delays receiving deliveries of new equipment, threatening their competitiveness and profit margins, as the Chinese juggernaut that supplies the bulk of their machinery comes under scrutiny amid a trade war.Recent shipments of machines made by Beijing-based Bitmain Technologies Ltd. to US clients have been delayed due to heightened Customs and Border Protection scrutiny, according to half a dozen industry executives. The delays coincide with the US Commerc...