A study by the Tax Foundation found these levies represent the largest tax increase since 1993, amounting to 0.54 per cent of GDP for 2026.
The tariffs are projected to reduce US GDP by 0.5 per cent and could undermine economic gains from previous tax cuts.
A spokesperson for Trump dismissed the study's findings, arguing that economic growth and rising wages occurred despite the tariffs.
Public opinion polls show 60 per cent of Americans disapprove of the increased tariffs, and the US Supreme Court is currently considering their legality.
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