The Trump administration is poised to announce sweeping new tariffs, which would replace existing import duties expiring this Friday and would cover dozens of U.S. trading partners. The new tariffs will replace temporary 10% levies put in place after the Supreme Court said President Donald Trump couldn’t instantly impose import duties by declaring a national emergency. Speaking on CNBC, U.S. Trade Representative Jamieson Greer said the new tariff process will be very broad.“Well, it covers 60 countries — 60 — and about 99% of our trade,” he said.The new tariff would range from 10% to 12.5%. The Trump administration is using a different section of trade law to justify the new import taxes, accusing U.S. trading partners of importing goods allegedly made with forced labor. President Donald Trump is clearly trying to rebuild the tariff wall torn down by the Supreme Court, said Laura Veldkamp, an economist at Columbia Business School.“This really looks like an excuse to try to resurrect the original tariffs under some other guise,” she said.Veldkamp also said that these new tariffs will add to uncertainty for U.S. businesses, because they’ll probably be challenged in court. That could be a long process, leaving U.S. companies in limbo. Importers from other countries may feel that a decision on a certain country was unfair and “may decide that they want to challenge a specific finding with respect to a specific country,” said Wendy Cutler, a former U.S. trade official who’s now senior vice president at the Asia Society Policy Institute. In the meantime, the Trump administration is conducting another trade investigation into countries it accuses of overproducing, driving down the price of some products and putting the U.S. at a disadvantage. Cutler doesn’t think those tariffs will be imposed until after the midterm elections.