Is it wise for Britons to heap abuse on Donald Trump? At present he is the marginal favourite to win next week’s US presidential election – with Britons strongly behind his opponent Kamala Harris. But is overt hostility sensible?

Most recent polls show two out of three Britons want Harris to win, including a majority even of Conservatives. The Labour party sent about 100 activists to aid Harris in some swing states. The UK media is almost universally hostile, calling Trump crass, illiterate, vulgar, coarse and fascist. He is identified with the Heritage Foundation’s authoritarian Project 2025, which he has disowned. Only Reform UK is for Trump. Surely dignity would counsel respect for an ally’s internal democracy, and caution in alienating the leader of Britain’s most powerful ally.

First, what’s new? Britain’s Labour and the US’s Democratic party have bonded for decades, including canvassing and attending each other’s conferences. As a student I once campaigned for Mayor Lindsay in New York,........

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