Donald Trump reaches for the dynamite on Iran

Donald Trump thrives on chaos, and where it does not already exist he seeks ways to create it.

It seems he believes chaos will throw up unexpected opportunities where more considered and cautious approaches have produced nothing but a logjam.

Certainly the Middle East looks like a series of immense logjams. Others, such as Mr Trump’s predecessor, Barack Obama, may prefer to loosen them with a crowbar after weighing carefully the likely consequences; Mr Trump reaches for the dynamite.