Duties on China surged to 145% just as fireworks companies were getting their final July Fourth shipments from the country, which makes the vast majority of supplies used in the U.S.

Most Republicans stayed aligned with the White House despite concerns about the economy.

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Tariffs on China will remain at their current levels, according to Stephen Miran, a key architect of President Donald Trump’s trade policies. Miran’s comments come at a time when the administration is trying to calm nervous investors but offering mixed signals.

President Trump on Wednesday dismissed concerns about bare store shelves as he spoke about his trade approach with China.