Donald Trump has used the mainstream press as a punching bag for many years, but in recent weeks his jabs have become even more frequent – and more ill-tempered.

He threatened to sue the BBC for $1bn last month over the editing of a documentary that aired more than a year ago. He called one White House reporter “piggy”, and told another – the well-regarded Mary Bruce of ABC News – that she was a “terrible person and a terrible reporter”. He called a New York Times reporter “ugly, both inside and out”.

And last Friday, his White House unveiled the latest wrinkle: a new website that supposedly tracks media bias. It offers a “Hall of Shame” and “media offenders of the week” to focus on reporting that the president dislikes. It names individuals and news organizations, and it points to the Boston Globe and CBS News, among others, for doing supposedly misleading and biased work. It uses terms like “left wing lunacy” to describe some of its complaints.

The site’s first iteration is........

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