During the tariff showdown, the U.S. pledged to stem the smuggling of weapons into Mexico. But this will be no easy task.

Stopping fentanyl from entering the United States presents major challenges, raising the question of what Mexico can actually ...

Drug policy researcher Jonathan Caulkins said there were 21 large fentanyl seizures at the Mexican border for every one along ...

MEXICO CITY—President Trump wants to deploy a blunt new tool to fight Mexican cartels that flood the U.S. with drugs, by ...

President Donald Trump's threat of tariffs on goods from Mexico, Canada and China is aimed at stopping the flow of fentanyl ...

A line of Mexican National Guard and Army trucks rumbled along the border separating Ciudad Juárez and El Paso, Texas.

President Trump has cited illegal flows of fentanyl and migrants as the main reasons for a planned 25% tariff on Mexican goods.

President Donald Trump's new tariff orders against Canada, Mexico and China all contain clauses suspending a duty-free ...

Mexican soldiers are deployed along the U.S.-Mexico border following deal after Trump threatened tariffs against Mexico.

The Mexican troops will be posted to hot spots along the border with high rates of illegal migration and drug and weapons ...

President Trump has declared that the illegal transit into the U.S. of migrants and drugs, chiefly fentanyl, is a national ...

While Trump delayed the tariffs on Canada and Mexico, levies on China have taken effect and the trade war and economic ...