Center for Immigration Studies Director Jessica Vaughan: “The largest growing category [of immigrants] has been chain migration”

President Donald Trump applauds as he finishes his first State of the Union address in the House chamber of the U.S. Capitol to a joint session of Congress Tuesday, Jan. 30, 2018 in Washington. (Win McNamee/Pool via AP)

Center for Immigration Studies Director Jessica Vaughan defines chain migration, following President Trump’s announcement of the fourth pillar of immigration, in his first State of the Union Tuesday. She breaks down fraudulent occurrences that have led to successful lottery visas for some.