He has antagonised the EU and insulted Theresa May – while cosying up to Putin and Kim. But the US president’s threats can’t simply be ignored.
Assassination attempts, cyber-attacks, military interventions – Russia is once again playing a deadly game with the West. Yet beneath the bravado is a nation riddled with insecurities.
Evidence of actual craziness might help win a game of chicken, but at the risk of the driver going over the brink.
The co-author of Tony Blair's Chicago speech on the tests for intervention.