GUADALAJARA, Mexico — Mexican officials are struggling to adopt a coherent response in the aftermath of the deadliest attack on U.S. citizens in the country’s recent history. And that could create an opening for President Trump.

The massacre of three women and six children, including babies, in the northern Mexican state of Sonora on Monday has sent shockwaves through Mexico and once again turned the world’s attention to the country’s brutal drug war.

The deepening security crisis puts Mexican President Andres Manuel Lopez Obrador, who is already under pressure for last month’s botched arrest of Ovidio Guzman, the son of former Sinaloa Cartel leader Joaquín “El Chapo” Guzmán, back on his heels.