HARDtalk’s Stephen Sackur speaks to the former US Senator, Joe Lieberman. A generation ago the first President Bush proclaimed a new world order, in which the United States would lead by example. Twenty-five years on, Donald Trump is in the White House - so what kind of example is the United States setting now? Joe Lieberman was former US Senator, Al Gore’s Vice Presidential running mate in 2000, and has recently been touted as a contender for FBI Director under the current president. Is Donald Trump fundamentally changing America's global role?