A poll from The New York Times and Ipsos found that Americans believe abortion, L.G.B.T.Q. issues and climate change concern Democrats more than the cost of living.
China chose swift retaliation for trade measures in the first Trump administration, but that led to an upward spiral of trade measures and much broader tariffs.
Canada, Mexico and China account for more than a third of the products brought into the United States. Tariffs could lead to higher prices for consumers.