New British prime ministers are usually desperate to establish a close relationship with the US president. Boris Johnson has a particularly strong motive to look for support in the White House.

The prime minister has finally made good on his promise to “get Brexit done” — and a trade deal with the US is meant to be a large part of the Brexit dividend. More broadly, British foreign policy has long rested on two pillars — membership of the EU and a “special relationship” with the US. Having kicked away one pillar, you would expect the prime minister to strengthen the second.

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