Opinion: 'I don’t suppose anyone remembers Dan Quayle, the semi-literate Vice President of the US, when the first George Bush was President. But I have thought of him a lot as the US misadventure in Iran has progressed. Like many conservative US leaders (Donald Trump, for instance), Quayle came from a wealthy and well-connected family. He talked the language of courage, strength, power and war. This went down well with his supporters till it was revealed that the brave vice president had avoided the draft and had chickened out of fighting in Vietnam (like Trump).'

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