President Donald Trump's in-laws have been officially sworn in as U.S. citizens. First lady Melania Trump's parents took the citizenship oath on Thursday in New York City. The Solvenian couple had been living in the U.S as permanent residents. Citizenship for Melania Trump's parents have set tongues wagging. Especially, since her husband, Donald Trump, has vehemently proposed ending family-based immigration, which he refers to as "chain migration." In a Tweet last November, Trump slammed CHAIN MIGRATION or bringing families into the US, calling it truly evil.