Arkansas Governor Sarah Huckabee Sanders defended President Trump's tariff authority after the Supreme Court ruled 6-3 that his use of the International Emergency Economic Powers Act was unconstitutional. The decision invalidated Trump's sweeping import taxes on foreign trading partners, with Chief Justice John Roberts writing that the IEEPA does not authorize such measures.

Sanders told NewsNation that Trump thrives when told he can't act, promising he would find alternative tools to pursue his trade agenda. Trump immediately announced a new 10 percent tariff on imports worldwide under Section 122 of the 1974 Trade Act, which allows up to 15 percent tariffs for 150 days to address trade deficits. Canada and Mexico remain exempt due to their trilateral trade agreement.

Some Republican lawmakers praised the ruling as a victory for constitutional checks and balances. Senator John Curtis called it proof that the Founders' system remains strong nearly 250 years later, while Senator Rand Paul noted it prevents future presidents from using emergency powers for extreme policies. The administration's swift pivot to alternative legal authority demonstrates the ongoing battle over presidential trade powers and its potential impact on global markets.