President Donald Trump is hiking tariffs on aluminum and steel as his administration presses countries to speed up trade talks, amid legal battles.

President Trump has a number of options at his disposal to implement tariffs, but none are as broad and aggressive as IEEPA.

The rulings against the levies in two federal courts – the U.S. Court of International Trade and the U.S. District Court in Washington, D.C. -- centered on Trump's unprecedented invocation of the International Economic Emergency Powers Act as a legal justification for tariffs.