So, it’s happened. Donald Trump has slapped a massive tariff on our aluminium and steel exports to the United States. This, after our government has spent weeks trying to forestall this event.

So, how will it impact our economy?

Today, international and political editor Peter Hartcher, on what message the American president is sending to Australia. And whether this decision, added to Trump’s other erratic moves made in his first 53 days in office, might just will lead our country, and others, down the road to a “nervous breakdown”.