An American professor and writer has said that Donald Trump’s “brain is rotting in front of us”, and claimed that to compare him to Joe Biden is “dangerous and wrong”. Sarah Churchwell, an American culture specialist and the author of a book examining division in the US, The Wrath to Come, was appearing on a panel at Hay Festival chaired by The Independent’s chief book critic Martin Chilton. They were joined by political podcaster David Runciman and We Need to Talk About Kevin author Lionel Shriver. Shriver claimed that, ahead of the US election on 5 November, she finds herself...