In domestic political terms, the foreign policy of the Biden administration has proved almost unimaginably successful – for Donald Trump, whom it enabled to run for president as the representative, however mendaciously so, of foreign policy restraint. A deep and searching debate on the Democratic party’s approach to foreign affairs is now essential.

Since the second world war there has only rarely been a significant difference between the Democrats and Republicans on foreign policy. The most significant divergence around the time of the backlash against the Vietnam war (initiated by a Democratic administration) and Watergate. This, however, lasted barely a decade.

After the end of the cold war, Democrats wholeheartedly adopted the “Wolfowitz Doctrine”, whereby the US should aim to be a hegemon not just in the world as a whole, but in every region of the world: in effect, an extension of the Monroe Doctrine to the entire planet. Barack Obama tried, to a limited extent, to push back against this, but was largely frustrated by the US foreign and security establishment – the so-called “Blob”.

Can the Democrats break free from the hold of the Blob? If they were guided by US public opinion, it should be easy for them to do........

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