Sacking a third of his Cabinet didn't save Macmillan, but it is Theresa May's best chance of survival

P rime ministers in trouble, or who think they are, traditionally hold a reshuffle. Most famously, after a haemorrhage of support to the supposedly moribund Liberal Party in 1962, and realising he was out of touch with public opinion, Harold Macmillan sacked a third of his cabinet in order to...