Trump's response to Mexican cartel boss killing includes tariff threats

The killing of a major Mexican cartel boss, known as El Mencho, has drawn a strong response from Trump. He and some U.S. officials, including Senator Ted Cruz, have warned Mexico that Trump would act or impose new tariffs if Mexico did not do more to fight cartels. This approach is being called the 'Doctrina Donroe' or 'Trump Doctrine' in Mexico, where officials are now trying to figure out how to respond to these demands.