President Trump heads home after a high-stakes summit with Xi Jinping as Iran, Taiwan and U.S.-China tensions take center stage. Gordon Chang reacts to the meeting and warns Taiwan remains a critical test for America. #FoxNews #Trump #China #Taiwan #Iran #XiJinping 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: