Omar García Harfuch is overseeing one of the most aggressive offensives in years against Mexico’s powerful criminal groups.

A military incursion into Mexico, even with the approval of the Mexican government, would likely create far more problems than it solved for US national security. A massive flotilla of United States ...

WASHINGTON — The Trump administration has begun detailed planning for a new mission to send American troops and intelligence officers into Mexico to target drug cartels, according to two U.S.