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

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.

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