It is not easy being a political columnist. Not even if you have been writing a column for almost forty years as I have. The problem, you see, is that all our political leaders seem to want only fulsome praise. Write one sentence that is marginally critical, and war breaks out on social media of a nasty kind with whichever party it is I have dared criticise. If it happens to be the Prime Minister, his army of vicious trolls gets into immediate attack mode.