In 1984, at an international population conference in Mexico City, the Reagan Administration announced that the United States would no longer contribute to nongovernmental organizations (NGOs) "which perform or actively promote abortion as a method of family planning in other nations." This policy became known as the Mexico City Policy.
The policy was upheld in court as constitutional. It remained in place until overturned by President Clinton on January 22, 1993.
President Bush reinstated the policy in 2001, and it was subsequently overturned by President Obama.
On January 23, 2017, President Trump reinstated the Mexico City Policy.