In the 1962 Japanese sci-fi classic King Kong vs Godzilla, the two giant monsters fight to a stalemate atop Mount Fuji. I have been wondering for some time when the two giants of American social media would square up for what promises to be a comparably brutal battle. Finally, it began last month — and where else but on Twitter?

‘Facebook was always anti-Trump,’ tweeted the President of the United States on 27 September.