US Secretary of State Marco Rubio arrived in Ecuador Wednesday to press the fight against "narco-terrorists" who have transformed the country into one of Latin America's most violent.

Rightward shift in Latin America comes as Washington pledges to grow influence, take militaristic approach to cartels.

United States Secretary of State Marco Rubio on Tuesday arrived in Colombia following the recent election of hard-right lawyer and US ally President Abelardo de la Espriella, and…