The Supreme Court will hear arguments Tuesday in a $10 billion lawsuit Mexico filed against top firearm manufacturers in the U.S., alleging their business practices have fueled cartel gun violence. The gun makers reject those claims.

As President Donald Trump pressures Mexico to address the flow of migrants and drugs heading north into the United States, the Supreme Court is set to hear arguments Tuesday in a major appeal about one thing that’s crossing the border toward Mexico: guns.

The justices will hear arguments in a $10 billion lawsuit by the Mexican government that claims gun makers are complicit in supplying drug cartels.