The only thing more terrifying than Trump fantasising about the deaths of millions of Americans under mushroom clouds was the sound of his supporters cheering at the line “let them take out”. What does this say about us, about America? And the silent Republicans? Lawrence O’Donnell on MS Now at least said it on Tuesday: “You live in a country, you live in a world tonight, where it is no longer news that the president of the United States appears to be insane. It remains the single most important ongoing news story of this era.”