The Supreme Court ruled in February that the president lacks the authority to impose unilateral tariffs using an emergency powers law.

The Trump administration this week stepped up its ambitious effort to replace about $1.6 trillion in lost tariff revenue that was eliminated by the Supreme Court’s decision to strike down a

The lawsuit takes aim at the tariffs Trump imposed to replace the ones the Supreme Court struck down.

The states allege that the president cannot sidestep a recent U.S. Supreme Court ruling that invalidated most of his previous tariffs.

The Trump administration has launched investigations into dozens of countries accused of failing to crack down on forced labor, flexing a law that lets the federal government impose tariffs.

A new brief of tariffs from the Trump administration could be the worst yet, according to Nobel Prize-winning economist Paul Krugman. Krugman warned that new tariffs set to be introduced by the president's team will affect not just U.

The Trump administration told a federal court on Thursday how it will refund companies after its sweeping “Liberation Day” tariffs were struck down by the Supreme Court last month. The Supreme Court ruled 6-3 last month that the sweeping global tariffs imposed using the International Emergency Economic Powers Act were unlawful,

The lawsuit filed by two dozen attorneys general seeks to invalidate the president’s new, 10 percent global tax on imports.