Since the end of World War II, the United States has remained a global power through foreign policy defined by what retired Ambassador Ryan Crocker calls a "three-legged stool" of defense, diplomacy and development.

A pair of labor groups representing employees at the US Agency for International Development (USAID) sued President Donald Trump on Thursday over his efforts to dismantle the decades-old agency as multiple sources told CNN that fewer than 300 employees are expected to be retained at the humanitarian agency.