On April 15, a legal advocacy group asked the U.S. International Trade Court on Monday to block President Trump's full tariffs on foreign trading partners, saying the president was acting overstepping his authority, Reuters reported. The lawsuit was filed by the nonpartisan Center for Liberty and Justice on behalf of five small U.S. businesses that import goods from countries affected by tariffs. These businesses include a New York-based wine and spirits importer, and a Virginia-based educational kits and musical instrument manufacturers.

The lawsuit challenges Trump's "Liberation Day" tariffs announced on April 2 and his separate tariffs imposed on China. "No one should have the tax power to impose such huge global economic consequences. The Constitution will give Congress the power to set tax rates—including tariffs—to the President," senior lawyer Jeffrey Schwab said in a statement.

White House spokesman Harrison Fields defended Trump's tariff policy in a statement. "People who never support Trump will always oppose him, but President Trump stands up for the United States. His plan to level the playing field for businesses and workers in response to the national emergency of our long-term trade deficit," Fields said.