Donald Trump often casts himself as a mere observer – a commentator on American public life rather than its most powerful practitioner and influencer. Whether on Truth Social, in an interview or at a doorstep encounter, he is never shy about venturing his “take” on sport, television, celebrities, you name it. Not so when the president of the United States volunteers, at great length, his ill-informed and ill-conceived “feelpinions” about medicine – especially vaccines and autism. US President Donald Trump gives his views on autism as Health Secretary Robert F. Kennedy Jr watches. But it was more like $20, so lengthy, repetitive and potentially damaging were his contributions.