Iranian deal is a triumph for the US

The Obama administration is remaking US foreign policy, and the agreement with Iran could pave the way for an alliance against Islamic State

It’s the only candle casting any light on the growing darkness that is the Middle East. Last week’s nuclear agreement signed in Vienna between the US and Iran is not only of enormous significance for the current crisis enveloping the region, but it also represents a major – perhaps defining – political triumph for the Obama presidency.

That presidency – which in recent times was being written off as a failure in contrast ...