Donald Trump has tapped Dr Casey Means, a wellness influencer with close ties to Robert F Kennedy Jr, the US health secretary, as nominee for surgeon general after withdrawing his initial pick for the influential health post. The US president said in a social media post on Wednesday that Means has “impeccable ‘MAHA’ credentials” – referring to the “make America healthy again” slogan – and that she will work to eradicate chronic disease and improve the health and wellbeing of Americans...