The Brief

WASHINGTON - The Supreme Court will hear arguments Wednesday on whether President Donald Trump has overstepped federal law with many of his tariffs .

A ruling against him could limit or even take away that swift and blunt leverage that much of his foreign policy has relied on.

Supreme Court to rule on tariffs

Big picture view:

Trump increasingly has expressed agitation and anxiety about the looming decision in a case he says is one of the most important in U.S. history.

Dig deeper:

The case involves two sets of import taxes, both of which Trump justified by declaring a national emergency: the tariffs first announced in April and the ones from February on imports from Canada, China and Mexico.

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