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 dispute focuses on whether Mexico can hold U.S. manufacturers liable for gun violence and comes amid rising tensions between the countries.

Mexico’s 2021 lawsuit accuses Smith & Wesson and Interstate Arms of knowingly supplying weapons to dealers who sell to traffickers. The companies’ lawyer compared the case to holding Budweiser liable for drunk driving,