http://immigration-professor.com; In this video, the Immigration Professor, Robert Perkins, discusses the unlawful presence bar to immigrating to the United States, when it is triggered and when it is not. This bar is very important for people who are marrying someone here illegally. You can see all of our informational videos on our website, http://immigration-professor.com. This video is not legal advice or a legal opinion. To get legal advice about your case, call our offices at 310-384-0200.