Trump and Xi have departed from the cool rationality that gave the world unprecedented peace and prosperity for the past 70 years.
Robert Mueller said almost nothing new when he addressed the American people for the first time about his investigation into Russian election interference. But it was an electric moment.
Given his history of publicly roughing up even the US's closest allies, does anyone think he'll give the barest thought to Australia's reputation in the US as he pursues his vendetta?
It is also unclear to what extent Mr Trump’s domestic concerns are contributing to his increasingly bellicose foreign policy posture.
One thing is clear: as Mr. Trump takes a wrecking ball to years of carefully nurtured US-China trade relations, Huawei won't be the only victim.
If China retaliates – and why wouldn’t it? – there will be substantial self-inflicted collateral damage to the US technology sector.