Last week we looked at the system of checks and balances that stops (or fails to stop) the US president from sending the country to war without authorisation. But before we get too smug, it's worth bearing in mind our system is demonstrably worse.

What are the rules in Australia as they stand?

"In Australia, there is no such check," Clinton Fernandes, professor of international and political studies at the University of New South Wales told Crikey. "The executive can send us to war with no oversight."