Why is Trump sledging 'nasty' Kevin Rudd?

When former Prime Minister Kevin Rudd declared Donald Trump the most destructive US president in history, a lot of people agreed.  But his scathing assessments of the former president don’t sit so well now he’s working as Australia’s ambassador in Washington.  Donald Trump could be elected president again in November and he isn’t happy.  So, what happens to Kevin Rudd and our alliance with America if Trump returns? Featured:  Dr Emma Shortis, senior researcher in international and security affairs at the Australia institute