WASHINGTON — President Trump enacted a sweeping new counterterrorism strategy aimed at crushing threats “at home and abroad,” with a heavy focus on drug cartels, Islamist terror groups and violent political extremists inside the US, a top White House official said on a press call Wednesday. Sebastian Gorka, deputy assistant to the president, described the 16-page framework as an “America First counterterrorism” blueprint centered on protecting the homeland by aggressively dismantling threats before they reach US soil. In line with the “ Donroe Doctrine, ” the strategy’s first priority is the “neutralization of hemispheric terror threats” — placing cartels squarely in the crosshairs. President Trump on Wednesday signed a new counterterrorism strategy for the nation. Gorka said the administration plans to “incapacitate cartel operations” and expand the use of Foreign Terrorist Organization designations to choke off their financing and logistics.…