Levies on Americans’ daily prescriptions and other medicines could raise costs, spur rationing and lead to shortages of critical drugs.

Economists say the U.S. manufacturing decline in recent decades was not mainly about free trade, but about the pace of change without time to adjust.

The U.S. tariffs on transshipment countries like Vietnam and Cambodia are so steep that they could force a major reassessment of global supply chains.

The 34 percent tariff announced on Wednesday is in addition to two rounds of import taxes the president already imposed since January.

China’s exports to developing markets have soared, opening indirect routes to the U.S. market that officials in Beijing worry may be closed under pressure from President Trump.