File photo taken on Oct. 11, 2017 shows U.S. President Donald Trump (C) walking to welcome visiting Canadian Prime Minister Justin Trudeau at the White House in Washington D.C., the United States. U.S. President Donald Trump on Wednesday threatened to terminate the North American Free Trade Agreement (NAFTA) as the fourth round of talks kicked off in the U.S. state of Virginia. Jan. 20, 2018 reaches one-year mark for Donald Trump as the 45th president of the United States. One year into U.S. President Donald Trump's presidency, the uncertainties and anxieties over his unconventional playbook appear to have not diminished. As he seeks to implement his campaign promises, which seem controversial and even unacceptable to many, rifts, feuds and controversies dogged the year and 2018 would probably not be any different. (Xinhua/Yin Bogu)