We have two choices: we can acquiesce and let this sociopathic sex pest grab our collective hand amid the scary world he has created. We can abase ourselves for special favours – such as exemption for British dual nationals. Or we can reject Trump in his entirety.

Just as Trump is meddling – via Ukip – in the racial politics of Britain, British liberalism and socialism has the duty now to intervene in the social politics of the US. We must bet on Trump’s defeat in 2020, help train and fund lawyers and journalists to hold him in check, and – once he is gone – attempt to rebuild the multilateral order. Yes, and ruin his state visit: through all forms of protest legally possible.

The shape of a Dump Trump foreign policy is clear: Britain must strengthen its alliance with countries whose governments and peoples share our values: France, the Netherlands, Germany, Canada and Greece. Although we are headed out of the EU, the case for the softest possible form of Brexit is only strengthened by the US’s descent into arbitrary government.

And we should ringfence Britain’s armed forces from inter-operation with a US military should it recommit to the use of torture in war.