President Donald Trump has signed off on a new U.S. counterterrorism strategy that makes eliminating drug cartels in the Western Hemisphere the administration’s highest priority, the White House announced Wednesday, the Associated Press reported. 

The 16-page strategy was released months after Trump’s administration published an updated national security strategy calling for the hemisphere to be the top U.S. focus, the news outlet said.

“We will not let cartels, Jihadists, or the governments who support them plot against our citizens with impunity. Terrorists of any kind will not be allowed to find safe harbor here at home or attack us from abroad,” Trump wrote in the document, according to the AP.

Sebastian Gorka, the White House counterterrorism czar who spearheaded the strategy, said the shift in priorities reflects “simple math,” telling reporters on a telephone call cited by the AP that more Americans have been killed by cartels pushing illicit drugs into U.S. communities than U.S. service members lost in conflicts around the globe since World War II.

“Whether it is strangling their illicit funds, whether it is tracking their drug boats, we will not permit them to kill Americans on a massive scale,” Gorka said, according to the AP.

The news outlet described the strategy as the latest example of the administration’s effort to keep U.S. foreign policy focused on the Western Hemisphere even as Washington manages worldwide crises. The administration has moved aggressively to reshape the region, the news agency reported, citing the ouster of Nicolás Maduro as Venezuela’s president, dozens of U.S. military strikes on alleged drug boats operated by cartels, and new pressure on the communist government of Cuba.

The administration’s campaign of blowing up alleged drug-trafficking vessels in Latin American waters has persisted since early September and killed at least 191 people in total, according to the report.

Trump has also sought to press regional leaders to work more closely with the U.S. to target cartels and to take military action themselves against drug traffickers and transnational gangs, which he says pose an “unacceptable threat” to the hemisphere’s national security, the AP said.