For the first time in decades, America's oldest allies are questioning where Washington's heart is.
This week, President Donald Trump and his deputies hit out at some of America's closest friends, blasting a "dumb" refugee resettlement deal with Australia and accusing Japan and Germany of manipulating their currencies. Ties with Mexico have deteriorated to the point its government had to deny reports that Trump told President Enrique Pena Nieto he might send U.S. troops across the southern border.
The dilemma for officials globally is figuring out if Trump's blunt style is simply a tactic to keep them off balance or the start of a move to tear up the rule book that has guided relations with the U.S. since World War II. In the mean time, allies have little choice but to prepare for the worst.