The « U.S. participation in the Compact process began in 2016, following the Obama Administration’s decision to join the UN’s New York Declaration on migration. The New York Declaration contains numerous provisions that are inconsistent with U.S. immigration and refugee policies and the Trump Administration’s immigration principles. As a result, President Trump determined that the United States would end its participation in the Compact process that aims to reach international consensus at the UN in 2018".

Ambassador Nikki Haley, U.S. Permanent Representative to the United Nations, issued the following statement:

“America is proud of our immigrant heritage and our long-standing moral leadership in providing support to migrant and refugee populations across the globe. No country has done more than the United States, and our generosity will continue. But our decisions on immigration policies must always be made by Americans and Americans alone. We will decide how best to control our borders and who will be allowed to enter our country. The global approach in the New York Declaration is simply not compatible with U.S. sovereignty.”

Source : UN