President Donald Trump is likely to dust off a 1930 trade law largely forgotten for decades to back his new reciprocal U.S. tariffs that will match other countries' higher import taxes, trade and legal experts say.

President Donald Trump’s desire to get even on countries by matching tariffs they have on American goods could come at a steep cost.

President Trump on Monday said he would be imposing 25% tariffs on all steel and aluminum imports into the United States. "This is a big deal, the beginning of making America rich again," Mr. Trump said as he signed the tariff orders in the Oval Office.