• Data from the Refugee Processing Center on admissions and arrivals into the U.S.
  • Reports from the Congressional Research Service on homeland security topics, including sanctuary cities and the 2017 Trump executive orders.
  • The Migration Policy Institute, a think tank that writes reports and produces data on immigration issues.
  • The Center for Immigration Studies, a think tank that advocates for lower immigration and tighter borders.
  • The Cato Institute’s Center for Global Liberty and Prosperity, which seeks to “protect human rights, extend the range of personal choice, and support the central role of economic freedom in ending world poverty.”