U.S. Family Reunification Program

The Slovenian-born parents of Melania Trump became U.S. Citizens at a naturalization ceremony in New York taking advantage of a family reunification program President Donald Trump has vehemently denounced.

Trump's in-laws Viktor and Amalija Knavs took the oath of citizenship, their immigration lawyer Michael Wildes confirmed.

Wildes said chain migration, which allows naturalized U.S. Citizens to sponsor close relatives for permanent residency, was a "dirtier" way of characterizing what he called "a bedrock of our immigration process when it comes to family reunification."

Trump has taken a hard line on immigration policy, criticizing so-called chain migration.

The republican president has said such a system steals jobs from Americans and threatens national security, calling for a merit-based system that gives preference to more educated, English-speaking professionals.