Fox News contributor Dan Hoffman joined 'Fox & Friends First' to discuss the Trump administration's warning to U.S. citizens in Iran and what regime change could mean for the nation and beyond. #foxnews #iran #world #news #middleeast Don’t just watch Fox News—be part of it. Become a Fox News Patriot today. https://youtube.com/foxnews/join Subscribe to Fox News: https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/