Sen. Elizabeth Warren (D-MA) suggested that senators “don’t have to wait for the courts to step in” to stop President Donald Trump’s tariffs.

Trump announced a 90-day pause on the majority of foreign tariffs, which have leveled to 10%. The only standouts are Mexico and Canada, in that their respective 10% tariffs have already begun, and also China‘s 145% tariff. While the president’s grounds to levy tariffs in times of war could be challenged in the courts, Warren suggested the Senate could stop them with their own legislative authority.