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Trump's tariff threats used to be aimed at economic targets. The portfolio is rapidly expanding.

Donald Trump's latest tariff threat appears to have stemmed at least in part from a nascent blockchain-based entrant into the influential world of global financial messaging.

Elon Musk and Vivek Ramaswamy are promising to go to war with government red tape. But they will face formidable foes — and perhaps not just from the "unelected bureaucrats" they often pillory.