Existing American tariffs already restrict steel and aluminum shipments from China, which is now flooding other markets with its exports instead.

China’s tit-for-tat duties on U.S. imports took effect Monday, just hours after U.S. President Donald Trump announced that he wants to slap new duties on all steel and aluminum imports to the U.S. The rapid-fire shots of tariffs and import curbs hearken back to Trump’s first term in office,

WASHINGTON — President Trump has paused imposing tariffs on small-value packages arriving from China, apparently to give federal agencies time to sort out how to process millions of such shipments that have come through the U.S. border every day without paying taxes.