Evangelical support for US President Donald Trump is back in the spotlight after the resignation of a leading journalist for Christian Post magazine. Journalist Napp Nazworth’s departure follows an op-ed from another Christian outlet calling for Mr Trump’s removal. The ensuing outcry has served as a proxy war among US evangelists over Mr Trump’s largely unchallenged grip on the religious right. He has claimed overwhelming evangelical support since taking office. So what is behind this conflict and what are the consequences for the president?